406 Scientific Intelligence. 
water, gave the phthalein in flesh-red crusts. The diacetyl, diben- 
zoyl, dinitro, and dibrom derivatives are described, as also mono- 
orthobromcresol-phthalein and its barium compound, By heating 
cresol and phthalic oxide with sulphuric acid, methyloxyanthra- 
quinone is produced; and this heated to 20 0°C. with excess of 
potash Een Pape methylalizarin. The phthalins, pbthalidins and 
phthalideins corresponding to the phthaleins of orthocresol are 
sa te in the same memoir.—Ber. Berl. Chem. Ges., xii, bee 
Feb. 1 
9. Sey and Strontia.—The fact that the Siapcunis ‘of 
baryta and strontia occur in nature in very different associations has 
long been recognized by mineralogists, and in the December No. of 
the Ann. de Chim. et de Phys., M. Dieulafait has published an in- 
teresting paper which pg a plausible explanation of this differ- 
ence of occurrence. In the first place the author pace ee the fact 
numerous | ais none, besides ee specimens of Seale in 
referred, giving rise first to an insoluble cettonade and a saitihds 
of a polysulphide and then to a sulphate and free sulpbur. Thus 
are explained the facts that celestine is found almost always in beds 
of gypsum and associated with crystals of sulphur. It is argued in 
conclusion that if the circumstances of the occurrence of celestine 
and barite at the present day differ so widely that this arises solely 
from the fact that the strontium compounds found in salt-beds are 
in a the second stage of their development, while the corresponding 
