APPENDICES 



Notes on the Experiments 



BEFORE performing an experiment the student should 

 write out carefully the question which he wishes to 

 have answered by the experiment. While performing 

 the experiment, he should note down what he does and 

 what he observes, making a rough sketch of the apparatus 

 used. When the experiment is completed, he should 

 state his conclusion. These notes should then be care- 

 fully copied into another book, with a neat drawing of 

 the apparatus. Several of the experiments in the text 

 extend over hours, days, and weeks. Some can only 

 be performed in spring or summer, and though many 

 can be managed during the winter, it would be best to 

 go through the book during spring and summer. 



Experiment 5. A glass bottle with a wide tube, 

 as shown in the drawing, would probably have to be 

 specially made by a glass-blower. They can, however, be 

 made very cheaply, and will, of course, be supplied in sets 

 of apparatus. When such a bottle cannot be obtained, 

 a fine glass tube could be introduced through the neck 

 before the bees'-wax was poured in. This would do just 

 as well. The water must be boiled to remove all dis- 

 solved air, and care taken that no air-bubbles are enclosed 

 under the bees'-wax, as otherwise the water will not fall 



