266 APPENDIX. 



y. Sachs* Solution. Potassium nitrate, 1 g. ; sodium 

 chloride, 0.5 g. ; calcium sulphate, 0.5 g. ; magnesium 

 sulphate, 0.5 g. ; calcium phosphate, 0.5 g. ; distilled 

 water, 1 1. ; two or three drops of iron chloride. Heat. 

 Only a part of the calcium phosphate will dissolve. The 

 whole should be shaken each time a part of the stock 

 solution is taken for use. This is the nutrient solution 

 to be used in experiments on green plants. 



k. Pasteur >s Solution. Water, 838 c.c. ; sugar, 150 g. ; 

 ammonium tartrate, 10 g. ; potassium phosphate, 2 g. ; 

 calcium phosphate, 0.2 g. ; magnesium sulphate, 0.2 g. 

 This is the solution to be used in the cultivation of the 

 chlorophyl-less plants. For some purposes, the sugar 

 may be omitted ; in other cases, its amount is sometimes 

 varied. 



