WE'LL DO SONE ADVEIITISCFG : How TO BLum TECIIXICAL -~DVERTISISG PAY. Pp. 62. Mnnclicstcr : Etnmott S; co., Lttl., 1030. WOOLLEP, S. G., and G. P. I?onn~:s~~;n. Pharii~nccuticnl Fortiiuliis. lot11 ctl., rcviscd and re-writtcn. 1'01. I. 1'11. svi + 1140. London : " Clicinist nnd Druggist," 192!). 15s. (Nay 2, 1030.) a COX, 1020. 22s. ~d . (xay 2,1930.) (Aug. 20, 1030.) S O W RECENT AND FORTHCOMING BOOKS H.M. Stationery Office S C C I J l i d Rcport of the X'abrics Co-ordinnting Rcscnrcli Cotnniittcc. (5s.) Tlic Xicroscopical Esnniiniition of Coii1. Pllysicd nnd Clicmicnl Sun-cy of tlic Nntionnl Cod Resources XO. 1G. (2s. Oil.) Rcport of tlic Food Invcstigntion Board for 1929. (2s. (id.) Rcport of the \'ntcr Pollution ltcsci~rch Sonrd for tlic ycnr cnclcd June 30, 1920. (Otl.) A Survey of Scottish Coking nnt1 Furnncc Conk. I'Iiysicril niid Chemicid S u n q of the Xintionnl Coal Itcsourcrs Xo. 15. (4s.) !I?lic Rrnctivity of Cokc. 3.-'l'lic Iliflucnce of 1ron Co~npounds. Pucl Rrscnrcli !L'cclinical l%pcr hTo. 25. (!)d.) The EstiiiiaLion of Frcc Cnlciuin Hydrositlo in Sct Cciiicnts : A Cdorirnctric J[ctliod: Building Iksciircli Tccliriicnl 1.'npr XO. 9. ((id.) Tlic Tnftucncc of Sizeof Con1 during Gns JItinufnclurc. Fucl Hcmircli Tcc111iic:il l'irpcr No. !?G. (Is. 3tl.) ' r h Signiiicnncc of Spores in tlic Corrclntioii of Cot11 Scnrlis. I'iirt 1.-The Pnrligrrtc Scnin-Soutli Torlishirc Arcit. l.'hysicnl cind Chcniicnl Survey of t,lic Xiitioiinl Con1 Ilcsourccs So. IS. (Is. 3d.) E. Arnold and Co. A n Inorgnnic Clicniistrj.. .By 11. C. Dcnlitir~~. (211tl ctl., 12s. lid.) Pliilosopliy of n 1Siologist. By Sir T,con:ird Hill. (Xo\wnbcr, 3s. (id.