Effect of Anesthetization on Albino Rats. 6i 



nation shows that pollen tubes make their tortuous way between 

 the walls of adjacent cells rather than traversing or penetrating 

 the cell. We should expect, therefore, to find not a cytase or 

 cellose-digesting enzyme, but rather a pectinase, capable of di- 

 gesting the pectin of the inner lamella. This has been proved in 

 the writer's experiments to be the case. 



Twelve kinds of pollen have already been tested, namely, 

 Easter lily, Lilium rubrum, red maple, Norway maple, Siberian 

 crab apple, Austrian pine, magnolia, dandelion, goldenrod, 

 ragweed, and corn. Rye, daisy, dock and timothy are now being 

 examined. 



The enzymes tested for, both qualitatively and quantitatively, 

 were as follows: amylase, zymase, invertase, erepsin, trypsin, 

 pepsin, lipase, catalase, reductase, cytase, tryosinase, and pec- 

 tinase. 



So far amylase, invertase, catalase, reductase, and pectinase 

 have been found in all. Several of these reactions are so rapid 

 and striking that they make excellent laboratory demonstrations. 

 Erepsin, pepsin, trypsin and lipase were found active in some and 

 not in others. Cytase, and tyrosinase have not yet been satis- 

 factorily identified in any. Zymase has been found so far only 

 in Siberian crab apple. 



36 (1496) 



Effect of the anesthetization on the subsequent behavior and 

 intelligence of albino rats. 



By D. L Macht and C. F. Mora. 



[From the Pharmacological and Psychological Laboratories of 

 Johns Hopkins University.] 



The behavior of albino rats was studied in Watson's maze. 1 

 Young adult rats were first trained so as to find their way out of 

 the maze by the shortest distance and in the shortest period of 

 time. After the animals have been thoroughly trained anes- 

 thetics were administered and the subsequent behavior after 

 recovery from anesthesia was studied. The effects of a single anes- 



1 Watson, J. B., Jour, of Animal Behavior, 1914, IV, 56-59. 



