Nature in Handcraft 



43 



lavender and thus forecast a change. When it is red rain or storm is indi- 

 cated. 



To prepare: Dip white blotting paper, which has been cut into small 

 pieces, in the following solution: 



4 oz. water 



i oz. chloride of cobalt 



l / 2 oz. common salt 



75 grains calcium chloride 



J4 oz. gum arabic 



Be sure to tell your chemist not to make it chemically pure, otherwise he 

 will make an extra charge. The above formula should make about 50 

 barometers. 



As soon as the pieces of blotting paper are thoroughly dry, set the 

 imaginations of your children to work. Cut out objects from colored paper, 

 being sure to include something cut from the blotting paper in your design. 

 Paste them on to a piece of wood or cardboard for a background and 

 attach a string or ring to the back so they can be hung on the wall. 



CARDBOARD PRINTING FRAME 



The following is an inexpensive printing frame that can be constructed 

 from materials found at camp. It is used for making Van Dyke, ozalid, or 

 blue prints. 



Direction for Making: Cut four pieces of cardboard to the size frame 

 desired one with a 5" x 7" opening is a good size. Also cut two pieces of 

 %" cloth tape four inches in length which will be used later for hinges and 

 two other pieces 8" in length to be used as ties. Take two pieces of card- 

 board and cut out center leaving an inch and a half margin all around to be 



