232 



(JOMPAKISON OF THE BABCOCK C'ENTKEFVCtAL METHOD WITH 

 THE GRAVIMETRIC :METH0D OF MILK ANALYSIS, H. S>-YDER, B. S. 



(l)]». 77-80). — Data are given on the coinparisou of the iiercentages of 

 flit iii<li(';it<'(l ])y tlic Biilx-rx-k ccuTrifugal iin'tbod jiiid tin- .ui;i\ i metric 

 (iisbcstus) method in oT sample?* of whole milk, -fs of skim milk. (» <tf 

 buttermilk, and .") of biitti-r. diiplieate tests being: made in many 

 instances. 



Of .■»."» dctcrminiiti(»ns of the fat in whole milk l>y the Habcock method, 

 the results of -3 (littered from those of the gravinietrie method by 0.1 

 j>er c«'nt «»r over, while only 7 (littered by 0.15 i>er cent or over, the 

 largest dirterence being O.L'<» per cent. Sixteen of the 77 determinations 

 by the Babcock method in skim milk dittered from the gravimetric 

 results by 0.1 ]ier cent or over, the largest ditt'erenee recorded being 

 0.1' ])ei' cent. Three of the 10 determinations in buttermilk dittered 

 l»y from 0.1 to O.is per cent fiom the gravimetric, and 4 (mt of the "> 

 determinations in buttei- dilferc*! from the gravinietrie bj' from O.L'S to 

 0.7 per eent. 



K'KLATION OK FIHRIN To THE EFFECTTAL CREAMING »»F MILK, 



II. Snyder. B. S. (pp. si, sl'). — The results are given of nmnerous 

 (letermin;ifions of the fibrin in tlic milk of several eows, made to 

 ;iscert;iin wlietlier a relation exists between tlie facility of the creaming 

 iind tlie content of tibrin. Pleasuring the tibrin i)resent by the volume of 

 oxygen liberate(l when milk was shaken with hydrogen peroxide "it 

 a])]»e:ns that there is no detinite relation between the amount of fat in the 

 skim milk [thoroughness of the creaming] and the volume of oxygen 

 liberated. The fat in the skim milk is the measuic of the efticiency (•< 

 the creaming process, and the volume of oxygen liberated is sui>i>osed 

 to be proportional to the amount of fibrin present; but the highest per- 

 centage of fat in the skim milk is accompanied by as low a volume <»f 

 oxygen as is the lowest jter cent. It is evident that there are other 

 factors of equal if not of nune imp(n't.anee than til>riu that afteeted the 

 creaming ]nocess of iiiesi- >ainples." 



New York Cornell Station. Bulletin No. 30. August, 1891 (pp. 40). 

 Some I'REi.niiNAKV studies of the influence of the ele< 



TKIC ARC light I PON GREENmUSE PLANTS, L. IT. BAILEY, ^f. S. 



(pp. S."»-lL*L', jdates L*, tigs. 7). — A record of ex]teriments by the author 

 in the winter and spring of 1890 and is'.tl in a low, tiat roofed forcing 

 house (L'(» by (10 feet i. designed for the growing of lettuce, radishes. :ind 

 cuttings. 



riif Imiisv is \ t iitil«UMl fiitir<l\ iVmii tin- peak by small windows liiii;;< il iit tli- 

 lidjif. It is li(;iteil l>y steam, tile visor running overjifjul aurl tlio letnriis all lyin-; 

 iiiidei (lie lienelies. This lioiisi' was iliviiled by a tij^lit board ]iaitition into two 

 iiearl.v e<|ual ]>i)rl ions lor our ttnriiose. One compartment was Irealed l<« ordiiiHry 

 I oiidil ions — siMili>;lit liy (Ihv and darkness by niiflit— antl llie uflni lia«l ^luiliubl 

 dniiiii; lb.' day and rl.Tlii.- li,!;lil diniiii;.! imii ui w Imli- ..I'ibe iiii;lil. In ill 



