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 *quently by anatomical casts made in the field. The final result was a model not only of the species but of the actual animal whose skin we were going to use. All this took a lot of time, study, and money, and it was quite a different thing from stuffing a skin with rags and straw. For a temporary effect the skin could be mounted on the clay model, but an animal so mounted would deteriorate. For permanent work it was necessary to devise some light, durable substance, which would not be affected by moisture, to take the place of the clay of the manikin. After a lot of experimentation I came to the conclusion that a papier-mâché manikin reënforced by wire cloth and coated with shellac would be tough, strong, durable, and impervious to moisture. It isn't possible to model papier-mâché with the hands as one moulds clay, so the problem resolved itself into making a plaster mould of the clay model and then using that to build the papier-mâché manikin. When a man wishes to make a bronze in a mould he can pour the melted metal into the mould and when it has cooled remove the mould. But you can't pour papier-mâché reënforced with wire cloth and if you put it into a plaster-of-paris mould it will stick. The solution of this difficulty struck me suddenly one day when I was riding into town to go to the museum.

"I've got it!" I exclaimed, to the amusement of my friends and the rest of the car full of people. As soon as I could get to my shop I tried it and it worked. It was to take the plaster moulds of the clay model and coat the inside of them with glue. On this glue