METEOROLOGY \VATEK. 425 



eludes tbe portion of Ibe State between Mississippi iind Tennessee rivers with 

 tbe exception of a narrow strij* almij,' ilie west banlc of Tennessee Iliver. In 

 Kentuclcy it includes all nf lii(> State west of Teiniessee River with tbe excep- 

 tion of a narrow strii» tliat extends along tbe west bank almost to Padncali. 

 In Illinois it includes a large part of Massac, Pulaski, and Alexander counlies." 



Tbe main topics discussed in tbe rei)ort are source of underground water, 

 artesian conditions, pbysical features of region, geology, underground-water 

 res<mrces. mineral waters of western Kentucky, .•nid metbods and cost of well 

 drilling. 



A l)ibliogra])b.T of .10 references to tbe most important articles on Ibe geology 

 and bydrograjiby of tbe region described is given. 



The effect of copper upon water bacteria, K. F. Kki.i.ik.ma.n .ind T. I). 

 Beckwitii ( r. .s'. Drpl. A(/r.. liiir. I'Uiiit Iiiiliis. Biil. 1110, pi. 7, />/*. ID). — Tbe 

 results of a study of llie resistance <if sevi-ral si)e<'ies of liacteria conunonly 

 occurring in Potomac liiver water to copper sulphate solutions of various 

 strengths are reported, as well as of tbe effect of carbon dioxid on tiie viability 

 of Bacillus coll and //. tjipJn. and of tbe reflation I'f co]ip(M- snlpbntc treatment 

 of water to filtration. 



In tbe first case tbe results indicate '" clearly that no danger to most of tbe 

 common sai>ropbytic bacteria can l)e exjiected from using concentrations of 

 copper sufTiciently strong to destroy B. coli." 



It was found that the presence of carbon dioxid matcn'ially increased tbe 

 resistance of B. call and B. tj/plii in tap water and in tri])le-dis'tille(l water alone 

 iind with the addition of c.ilcium carbonate. 



Experiments on tbe use of copper sulphate in connection witb liltration 

 showed "that in mecbanical liltration witb .alum it is necessary to limit tbe use 

 of copper sulphate to treatment some hours before coagulation. When solutions 

 of aluminum sulphate and copper sulphate are mixed and alkali or hard water 

 is added in (|uantith>s suHicient to cause precipitation the copper is coagulated 

 at once, while tbe ;iluminuni is deposited on tbe copper and incloses it. with 

 the residt that the copper-alum coagvdum is no moi'e toxic than is the pure 

 alum coagulum. When copjter and iron salts are i)recipitated together the 

 reverse of this seems to take place and the precipitate retains its toxic prop- 

 erties. . . . The presenc(> or absence of cai'ben dioxid is jirobahly imi)ortant 

 in tliis connection." 



On the use of Bacillus prodigiosus as an indicator in water examination, 

 K. IIiL(iKU.MAX.\ (Arch. Ujjy., 'j'J (I'JOU), No. 2, pp. J-JO-l-JS). — Investigations of 

 the behavior of this color-pi'oducing organism under different conditions are 

 rejjorted wbicb indicate that it is not reliable ;is a quantitative means of ascer- 

 taining tbe bacterial efficiency of filters. 



Prevention of stream pollution by distillery refuse based on investiga- 

 tions at Lynchburg, Ohio, II. Stari.er (!'. H. Gcol. Hurvci/. Watcr-Hiippi!/ a ml 

 Ivriij. Pit per Ao. 11',). pp. 3-'i. pi. J, fls/s. 5). — "This report gives an account of 

 investigations carried on near Lyncbbvu'g, Ohio, t i discover feasible means of 

 jireventing tbe pollution of streams by distillery refuse. Lynchburg is in High- 

 land Count.v. Obio. a few hundred yards east of the East lirancb of Little 

 Miami Kiver and about ('.() miles nortbeast of Cincinnati. It lias a ])oi)ulati()n 

 of a little less than LdOO.- Above and below Lynchburg tbe East lirancb of 

 Little Miami River flows through an agricultural district, and as tbe town has 

 no .sewerage system the stream is not seriously polluted excei)t by the distillerj' 

 i-efuse. Tbe investigation was therefore confined to tbe following sub.iects : 

 (1) Tbe processes at tbe distillery and tbo sources of jiollution; C2) tbe effect 



i75o."*. — No. ."> — "7 M ;; 



