422 ADVANCED PHYSIOLOGY 



Modeling wax: 



(a) Any dealer in art goods. 



(6) Devoe and Reynolds, Fulton Street, New York City. 



General laboratory supplies, not named above: 



(a) Arthur H. Thomas Company, Philadelphia, Pa. 



(6) Central Scientific Company, Chicago, 111. 



Formulae and Methods of Making Various Substances 

 Mentioned in This Book 



1. Formula for iodine solution for use in testing for starch : 



4 parts potassium iodide 

 1 " iodine 

 40 " water 



Dissolve above and add 960 parts water. Smaller amounts may be 

 made using same proportions. 



2. Formula for Pasteur's solution : 



10 parts potassium phosphate 

 1 " calcium phosphate 

 1 " magnesium sulfate 

 50 " ammonium tart rate 

 750 " cane sugar 

 4188 " water 



3. Formula for artificial gastric juice : 



0.2 parts hydrochloric acid 

 0.1 " pepsin 

 0.05 " calcium chloride 

 0.05 " potassium phosphate 

 100 " water 



The above is a precise formula, but for ordinary experiments for ele- 

 mentary classes the calcium and potassium compounds may be omitted and 

 the other two used in greater strength. 



4. Formula for artificial pancreatic juice: 



0.6 part common salt 0.2 part pancreatin 



0.2 " sodium carbonate 0.2 " potassium phosphate 



0.2 " diastase 0.2 " lipase 



100 parts water 



For elementary work the potassium, diastase, and lipase maybe omitted. 



