Birch Bark Canoe Video

Birch Bark Canoe Video

By Kevin Brownlee, past Curator of Archaeology

 

For those of you who have enjoyed my blogs on the creation of the Birch Bark Canoe you will be interested in seeing the video of how it was made. During the intensive 7 days we spent making the canoe Lakeland Public Television documented the construction of the birch bark canoe step by step. Scott Knudson filmed much of the activity and interviewed each of us about the canoe and what it meant to each of us. Scott was one of the producers and edited together a 57:03 minute documentary. The filming was funded under the Minnesota Arts and Culutral Heritage Fund.

You may also be interested in the full un cut interview with Grant Goltz which has also been uploaded to YouTube, above. The interview with Grant Goltz was filmed for audio and video clips used in the full hour documentary (Search Grant Goltz).

Planning the North American Prairie Conference

For the last several months I have been helping to organize the 23rd North American Prairie Conference (NAPC) (click here for conference details) which will be held at the University of Manitoba from August 6-10. This is first time that this conference has been held in western Canada (it is usually held in the mid to western U.S.). I’m looking forward to learning more about prairie conservation and restoration initiatives from other Canadians  as well as our American neighbours. This conference will feature a number of prominent prairie enthusiasts including Canadian authors Sharon Butala and Candace Savage as well as Dr. Wes Jackson from the Land Institute in Kansas and Dr. David Young from the Natural Resources Institute in Winnipeg. Ojibway elder David Daniels will be talking about Canada’s native plants and their traditional use.

A panoramic photograph of the iconic bison diorama in the Manitoba Museum. Four taxidermized bison are posed running as a rider on horseback holding a rifle chases after them. The mural behind depicts a full herd with more riders in pursuit.

The conference banquet will be at the Manitoba Museum.

A bull elk is situated in a parkland habitat full of grasses, herbs, shrubs and trembling aspen trees in the fall at the Birdtail Valley in Riding Mountain National Park.

The Manitoba Museum will be hosting the NAPC conference banquet on August 9. Rather than a typical sit down dinner, attendees will be able to graze their way through the Museum’s galleries while socializing and interacting with interpreters and yours truly. I will be presenting some of the findings on my recent pollination and rare plant research as well as leading the conference tours to Spruce Woods Provincial Park and Riding Mountain National Park. The former Curator of Botany, Dr. Karen Johnson, will be leading the pre-conference field trip to the Northern Studies Centre in Churchill, Manitoba where participants will learn more about the wildflowers and whales in the region.

 

Image: The post conference field trip will go to Riding Mountain National Park, a spot where the prairie meets the forest.

Conferences like this provide a great opportunity for professionals to meet and exchange information that will assist with their work. But it is also a chance for people who are just concerned about prairie conservation to learn more about these beautiful and intricate habitats that are now almost gone. Hope to see you there!

Dr. Diana Bizecki Robson

Dr. Diana Bizecki Robson

Curator of Botany

Dr. Bizecki Robson obtained a Master’s Degree in Plant Ecology at the University of Saskatchewan studying rare plants of the mixed grass prairies. After working as an environmental consultant and sessional lecturer…
Meet Dr. Bizecki Robson

Replicating rex

By Dr. Graham Young, past Curator of Palaeontology & Geology

 

The Manitoba Museum is home to many unusual and unique specimens. Among the most remarkable is the world’s largest complete trilobite, the holotype specimen of the species Isotelus rex. Over the years we have occasionally received requests from other museums for replicas of this striking fossil.

More than a decade ago, before the specimen ever went on exhibit, we had a mould prepared by an outside contractor who also made a number of resin replicas. These were on the shelf and ready to be painted if an order arrived. But eventually those replicas ran out, and when a new order came in from a museum in Japan last year, it was discovered that the original mould was too old and worn to be used again. A new mould was needed, which meant that we would have to remove the specimen from its exhibit in the Earth History Gallery.

A large oblong fossil specimen of a trilobite.

The holotype of Isotelus rex, MM I-2950

A display case containing  a large fossil trilobite specimen along with a fossilized trackway.

The I. rex type specimen, on exhibit with a trackway and other trilobite material.

So we pulled out the case, carefully slid out the fossil (this is tricky, because it weighs about as much as I do!), and wheeled it away to the artists’ studio to be worked on by Debbie Thompson and Betsy Thorsteinson. While the specimen was “on leave” from the exhibit, it was temporarily replaced by one of the existing replicas.

The following photos are Betsy’s documentation of the complex and fascinating replication process. Our artists are tremendously skilled, as indicated by the high quality of work in so many of our galleries, and by the attention to detail in the preparation of these perfect trilobite replicas.

A fossil specimen on a work table encased in latex and cheesecloth.

First, the fossil specimen was coated with layers of latex to precisely replicate its surface. This was strengthened with cheesecloth.

A fossil specimen on a work table encased in a white plaster jacket with two piece of wood bracing the top portion.

A plaster jacket was built up over the latex, and braced with wood.

The formed mould placed upside down on a work table as an individua; wearing a white lab coat, blue gloves, a respirator, and safety glasses uses a paint brush to apply a coat of mould separator on the interior.

Once this had dried, the mould was pulled from the fossil. Debbie painted a layer of mould separator onto the latex prior to casting.

An individual wearing a white jumpsuit, blue gloves, a respirator, and safety glasses leaning over holding a drill with a mixing bit into a basin of polyester resin.

Polyester resin had to be mixed very quickly, as it begins to set within minutes!

An individual wearing a white jumpsuit, blue gloves, a respirator, and safety glasses applies resin with a paint brush on the inside of the large mould.

The resin was applied to the mould.

Fibreglass layered along the interior base of the mould.

Fibreglass was layered in to strengthen the cast.

Lightweight foam filling the form of an upside-down mould. The open end of an air ventilator hangs above the mould.

As a solid resin cast would be extremely heavy, the interior was filled with lightweight foam.

A flat coat of resin on the top of the trimmed foam within the mould. The open nozzle of an air vent hangs above on the left side.

After the foam had been trimmed down, a resin coat was applied to the back of the replica.

Two individuals, both wearing black t-shirts and blue jeans, stand either side of a work table peeling a flexible latex layer off of a replica fossil trilobite specimen.

Bob Peacock and Marc Hébert peeled the latex from the replica.

An individual wearing a white smock paints a beige base coat on a large model trilobite specimen. Further back on the work table is the original trilobite specimen.

Debbie applied the first coats of paint to the replica. Note that the original specimen was nearby for reference.

An individual leans over a work table, painting a large model trilobite specimen. On their right side is the original trilobite specimen and they use their right hand to cup the portion they're replicating on the left.

Painting of the replica was almost finished. As Debbie says, “The detail work takes a lot out of you. I cup it like this to keep my spot while painting.”

An individual traces a large fossil trilobite replica onto brown paper placed beneath it.

Debbie traced the finished replica onto brown paper, so that a precisely fitted crate could be prepared.

The replica carefully encased in a packing crate.

The crated replica, ready to be shipped to Japan!

The Virtuous Dandelion

On occasion I’ve met people who would ask, in reference to a plant that I was studying, “what good is it?”. I was initially somewhat baffled because I assumed that most people knew that plants are needed for an ecosystem to function properly, and that since ecosystems provide humans with clean water and air, they are important. But sadly many people view species from a complete utilitarian viewpoint, assuming that if you can’t eat it or cut it down to make furniture, it is useless and therefore expendable. One argument for the conservation of all plants is that we simply don’t know which ones may yield chemicals potentially useful to humans. What is considered a useless plant one day could be a life saver on another.

The Pacific Yew tree (Taxus brevifolia) was long considered a “weed” by foresters. In the 1960’s an extract from this species called paclitaxel was found to kill cancer cells. The drug Taxol was approved by the FDA in 1992 and is now a commonly used in the treatment of ovarian and breast cancer.

It was nice to hear that another much maligned plant, namely the common dandelion (Taraxacum officinale), is also being investigated for its anti-cancer properties (read the CBC article here). An extract from dandelion roots dug out of the lawn by graduate students at the University of Windsor was found to kill leukemia cells but not healthy cells (see details here). I find it very ironic that a plant that people have spent thousands of dollars trying to get rid of (in the process of doing so exposing themselves to potentially cancer-causing toxic chemicals) may actually hold the key to curing a form of cancer: leukemia.

Close up of a small yellow dandelion in green grass.

Chemical compounds in dandelion may help prevent disease.

A small bristly bush growing in patchy soil.

Lamb’s-quarters is an exotic weed that is edible and nutritious.

What people may not know is that dandelions have actually been used medicinally in ancient China and in Europe since at least the 11th century for its diurectic and detoxifying properties. Modern herbalists prescribe dandelion root for a variety of ailments. The dried roots are typically harvested, dried, and brewed to make a tea that tastes somewhat like coffee. Dandelion leaves are also edible and very nutritious, being especially high in vitamins A and C. You can collect the young tender leaves and throw them in a salad (just make sure they come from a lawn that hasn’t been doused with herbicides!). The roots and flowers can also be made into alcoholic beverages such as dandelion wine and root beer. Other “weedy” plants that are edible include burdock (Arctium spp.) (its roots are edible) and Lamb’s-Quarters (Chenopodium album) (it’s leaves are very nutritious). Burdock seed heads were actually the inspiration for velcro!

Ralph Waldo Emerson said that “a weed is a plant whose virtues have not yet been discovered”. It’s time for us to appreciate the virtues of weeds like the dandelion!

Dr. Diana Bizecki Robson

Dr. Diana Bizecki Robson

Curator of Botany

Dr. Bizecki Robson obtained a Master’s Degree in Plant Ecology at the University of Saskatchewan studying rare plants of the mixed grass prairies. After working as an environmental consultant and sessional lecturer…
Meet Dr. Bizecki Robson

Step 5 Birch Bark Canoe

By Kevin Brownlee, past Curator of Archaeology

 

On day 7 Myra and I awoke to another beautiful day. We decided that we would complete all the sewing, attaching the gunwale caps and final trimming but would not pitch the canoe. Grant had offered to complete this last stage after we returned to Winnipeg.

We all marvelled at the beauty of the canoe now that it has the final shape. It is amazing that in one week we could turn bark and wood into such an amazing watercraft. Clearly there is nothing “Printive” about a birch bark canoe. Grant spoke about how when Europeans arrived to North America they came from a long tradition of boat building. However Europeans found them unsuitable to the navigate the waterways of the boreal forest and quickly adopted the birch bark canoe.

A birch bark canoe on sawhorses under an open sided tent. Three individuals stand at the ends of the canoe.

Unpitched canoe 15 feet long.

Three smiling individuals posing around a birch bark canoe supported on sawhorses under an open-sided tent.

Kevin, Grant, and Myra by the our canoe.

Later that Fall on a vacation from the office I took the canoe into northern Manitoba for the inaugural launch into the clear waters of the Canadian Shield. Paddling on the lake I realized this is probably the first time in over a hundred years that anyone has paddled a birch bark canoe in the area. What an amazing gift from relatives from the south.

A birch bark canoe partially banked at the side of a body of water.

Canoe pulled up on shore.

The view over the bow of a canoe on a body of water. To the right is a rocky and treed bank.

First Paddle.