Indicators, their us in quantitative analysis and in the colorimetric determination of hydrogen-ion concentration. By Dr. I. M. Kolthoff, translated from the 2nd German edition, revised and enlarged, by N. Howell Furman, Ph.D. Pp. xii+269. New York: John Wiley & Sons, Inc.; London: Chapman & Hall, 1926. Price 17s

✍ Scribed by Prideaux, E. B. R.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1927
• Weight: 146 KB
• Volume: 46
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000462604

✦ Synopsis

OHENISTRY AND INDUSTRY GO3 per liead of t,lic aggregate number einployed, tlie output of ccnicnt was 194 tons in 1007 a.nd 244 tons in 1924. The larger out-turn of ccnicnt per liend'was clue doubtless to the more general cniploynicnt of rotary kilns. In I007 tlie number of persons cniploycd in tlic industry was 14,810, and in 1924 the number totnlletl 12,874. TIE total capacity of the engines nt tlic cement n-orlrs and quarries in tlic inilustry was 90,256 1i.p. in 1924, of which nearly 20% was in rcscrve or idle, compilrcd with G0,079 h.p. in 1907. .The capacity of electric gciierators at ceincnt works in 1924 was 43,700 kw., nnd in 1907, G(i85 km.

Spanish Potash Production

A Spanish ininist.erin1 dccrcc fixes tlie production of potash snlts in Spain a t a ninsiniuni of G0,000 tons and a minimum of 15,000 tons, tlie content of potassium chloride bcing SO% in both cases. Not niore than 25% of the total output mny be cxportcd.