G7 



statements previously matlo, tliat in <;(>neral any factor wliicli liindora 

 tlio vijjorons <lev('l()])nMMit of the phint is likewise disadvantiijicons to 

 tlio formation of nicotine. 



Variation in the transpiration of tlic plants was brought about by 

 covering? a number of jdants with glass (;ases closed on all sides, that 

 is, increasinj^ the humidity oftlie atmospiiere, while others were jjrowii 

 in the open air and aliowe<l to transpire natuially. Tiie results follow: 



I'cr ciMit nitotinn. 



TlnliiiHloiod triitiHi>ii;i(i()ii ' i>i.,,,f o •> lu) 



1 riinsjiiivil toil art I lie I ally (IiiiiimikIu'iI / .,, , ., -.- 



Since in liindeiiiig' tlit^ transpiration the temperature was raised anil 

 heat has b(>en sliown to be fa\'oiable to a high lueotine content, it seetus 

 (piite doubtful if any good effects are to be attributed to the diminishing 

 of the transi)iration. 



The results of the investigation seem to i)oint to the fact that heat, 

 light, and a comparatively dry rather than an excessively moist soil 

 are favorable to the formation of nicotine, and that the effect of these 

 factors on the ni<;otine (;ontent is more marked than on the total 

 organic matter of the i)lant. 



Increase of the fat content of milk by feeding cocoanut cake, R. Heinrich 

 {Ldndir. Ann. d. meek. pat. W'rcins, LSDl, 7>/>. (i.VTS). — Two exi)eriments 

 tocoujpare tlie elVect of cocoanut cake and peanut cake on the fat con- 

 tent of milk, were made under the direction of the author in ]SS!> and 

 1800 at the exjXMiment station at Rostock, Germany. The first experi- 

 ment was made with two lireitenburg cows which had calved in 

 February, 1880, and lasted from June 1 to Decendier 10, 1880. During 

 this time 1 kilo of peanut cake or 1.5 kilos of cocoanut cake per <lay were 

 fed with a basal ration (!omi)osed of rye meal, hay, oat straw, and beet 

 leaves or beets, and which remained as nearly as possible the same 

 throughout the experiment. The cows were alternated from one ration 

 to the other in periods of 3 weeks during the whole experiment, one 

 cow receiving the cocoanut ration while the other received the ]ieanut 

 ration. The cocoanut ration was at all times slightly lower in i)rotein 

 but somewhat richer in fat and carbohydrates than the peanut ration. 

 Tlie milk was analy/A'd weekly. The average amount of butter fat 

 l>roduced per day by each cow on each of the ratious was, from June 1 

 to December 7, as follows : 



lint lev fill prodiici'd per day. 



On tlio poanntrako ration .. 

 On the cocoaniit-cake ration 



Cow- 

 No. 1. 



Kilo. 

 0. 36.") 

 0.3G6 



Cow 

 No. 2. 



Kilo. 

 0.413 

 0.4S6 



