METEOROLOGY WATER. 9 



The separation of carbohydrates by means of pure yeasts, J. Konig and 

 I*. IhiKMANX iZtxchr. I iitirsmh. Xalir. ii. dciuisNiiitl.. /.? {1007), No. 3, pp. 

 llS-132). — A suiuniary and disc-ussion of oxperiniental and other data regarding 

 the use of yeast as a moans for separating carbohydrates of different sorts. 

 This method is most applicable, according to the authors, when a yeast can he 

 found which has no action upon a given sugar, but attacks other sorts. Since 

 estimating the amount of fermented sugars from loss of weight, as shown by 

 carbon dioxid formed, does not furnish very accurate data, yeasts are especially 

 satisfactory for the separation of glucose and maltose. 



The determination of the sugar content of dried beet chips and sugar 

 chips, F. Stroiimer and (). Fallada ( Wclni'iclir. Crnf. ]'er. Riihriiz. ln(J}i^. 

 [Vienini]. .}.> (Wdl). \<>. l.i. /t/i. 16.]. IH'i). — .V study of the comparative value of 

 methods. 



The Polenske number, M. Siegfelo {Cheiii. Ztfi-. 31 (101)7), Ao. .^0, pp. 

 511-513). — The author has studied the I'olenske method of determining the 

 presence of cocoanut oil in hutter f(ir a i)eriod ot 2i years, and in this article 

 has summarized his results along with those of other investigators. 



The I'olenske number of the butter fat was increased to some extent by feed- 

 ing coc-oanut cake to cows and to a nuich greater degree i)y feeding beet tops 

 and leaves. The author's compilation of 8.")4 determinations of the Polenske 

 mimlier shows variations ranging from 1.20 to 5.30. The addition of consider- 

 ahle cocoanut oil would be required to raise the lowest nunjber to the highest 

 mentioned. It Is therefore not believed by the author that the addition of small 

 quantities of cocoanut oil, say 10 per cent, can be detected with certainty In this 

 way. The method, nevertheless, is considered of great i)ractical value. 



Distillation device especially for nitrogen determination, C. Block {Ztschr. 

 ChPin. ApparatciihtiiKlc. .^ \10<i7]. pp. -'ill. '/7, p<i. J; ah.^. in Cticiii. Zciitbl.. 1007, 

 I. Ao. 11, p. 781). — A check bulb through which runs the stem of a thistle tube 

 for introducing alkali for neutralizing the acid in Kjeldahl determinations with- 

 out danger of loss of ammonia, is described. 



METEOROLOGY— WATER. 



Treatise on the weather for farmers, P. Holdefletss ( W'itterungskunde fiir 

 Laiiflirirtr. Stuttgart: Eiigeii I'hiier, 1907. pp. VII-\-S-'i, pgx. 1'/. rtiarts 6). — 

 Among the topics discussed in this treatise are the importance of meteorology 

 in agricultui-e. climate, the importance of weather predictions for the farmer, 

 the making of meteorological observations in agriculture, including observations 

 on rainfall, temperature of the air and of the soil, humidity of the air, winds, 

 clouds, sunshine, atmospheric pressure, weather changes, and phenological 

 studies. 



Collected contributions from the field of meteorology and terrestrial mag- 

 netism, W. VON Bezoi.d and A. Coym {(jcsanimeltc AJiluiiiiUHiigcii a us den 

 (irl)ieteii der Metcorologic mid dcs Erdmagiiet'tKiniis. Bntii.sirick: F. Vieweg 

 d- Son, 1006, pp. T7//-(-.'/.J.S; rev. in Nature [London]. 7() (1007). No. 10.58, pp. 

 2H, 29). — These are the crHlected works of the eminent late head of the Prus- 

 sian Meteorological Institute. The subjects treated include the phenomena vis- 

 ihle after sunset (Purpurlicht) ; thunderstorms and sunspots ; thermodynamics 

 of the atmosphere : temperature and moisture conditions in cyclonic and 

 anticyclonic weather : temperature, pressure, rainfall, cloud and magnetic poten- 

 tial .around iiarallels of the earth; and the Gaussian theory. 



Monthly Weather Review (Mo. Weather Rev., 35 (1007), A'o.s. 3. pp. 103-15.',. 

 fig.s. 10. chart.$ 10; J, pp. 15.5-205, figs. 31, charts 9). — In addition to the usual 



