AMMONIUM SALTS UPON PLANTS. 





c 

 0 



Length. 









conditi 



April 

 14th. 



April 

 I9tli. 



I^eaves. 



Remarks. 





A 



28-29 

 cm. 



29-30-5 

 cm. 



Vellow 4 

 Dried up 5 



turgor, leaves etiolated. 



0.2 

 Ammc 

 carbc 



15 



28-30 

 cm. 



30-33 



Green 2 

 Partially yellow 5 

 Perfectly dried 2 



No new i-ootlets 



Sodium 

 carbonate. 



A 



29 



30 „ 



A 1 in rioi" ill flip vfi 



yellow, but still healthy. 



Rootlets developing. 



IJ 



30 „ 



34 - 



Green 3 

 Partially yellow i 

 Yellow 3 



Rootlets developing. 



u 



A 



29 >, 



31 



Yellow 5 

 Dried up 6 



No new rootlets. 



< " 



B 



28 „ 



32 „ 



Green 2 

 Partially yellow 5 

 Dried up I 



New rootlets somewhat 

 formed 





A 



Zo „ 



32 „ 



Green 2 

 Partially yellow 6 

 Dried up 3 



New rootlets. 





B 



28-31 



31-35 



Most of the leaves 

 green ; dried up 2 



Numerous new 

 rootlets. 



A fourth experiment with branches of Cydonia japoiiica, 

 Pyi'us Toringo, and Brassica campcstria, covered with buds and 

 partially with flowers, was carried on as before. Again, the 

 noxious effect of ammonium carbonate in o.i and 0.2% solutions 

 was quite evident after five days, when compared with the starv- 

 ing plants (A) kept only in water and with tlie previously well 

 nourished plants (B) kept in ammonium carbonate. But in this 

 case also sodium carbonate had caused some noxious effects with 

 Pyrus Toringo (A) and Brassica campestris (A), All the blos- 

 soms o{ Brassica campestris (A) Irad withered under the action of 

 ammonium carbonate. 



