14 



with the same contraction of the cells of plants which have 

 no nervous system." (Prof. J. W. Draper). 



"It is impossible not to be struck with the resemblance 

 between the foregoing movements of plants (sensitive plants) 

 and man}' of the actions performed unconsciously by the 

 lower animals, etc. Yet plants do not of course possess 

 nerves, or a central nervous system ; and w^e may infer that, 

 with animals, sucJi f^lnicfvres serve only for (he more perfect 

 transmission and for the more complete intercommunication 

 of the several parts." (Darwin). 



"In the last instance (iinal analysis) indeed, I might say, 

 animal and vegetable life must of necessity agree in all 

 essential points, indudin;/ the phenomena of irritability "\' 

 (J. von Sachs). 



In addition to Mr. Bergen's analogy before mentioned, 

 which he would have the reader believe to be mine, he gives 

 a mangled and distorted account of my explanation of the 

 origin of the honey guide by quoting one half of the same 

 only, omitting a very im[)ortant part, which cannot fail to 

 convey a false impression. While seeking for Mr. Bergen's 

 views upon the color of autumn leaves (to be referred to 

 later) in his small volume of Elements of Botany, the 

 writer's attention was arrested by two remarkable state- 

 ments : — 



"Old leaves are found to be loaded with mineral matter 

 left behind as the sap drawn up from the roots is evaporated 

 through the stomata." p. 117. 



Mr. Bergen appears to be ol)livious of the fact that sap 

 may contain many ingredients other than mineral matters 

 which are not evaporated, and that these substances may 

 occur even in the roots of plants, as sugar in beets, sweet 

 potatoes, etc., albumen in the juices of carrots, turnips, etc., 

 gluten in the juices of turnips, starch in sago, tapioca and 

 arrowroot, etc., all of which go to build up the stems, 

 leaves, flowers and seeds and do not go off into the air I 



Mr. Bergen evidently confounds sap with water. 



