388 Scientific Intelligence. 
his experiments to test the extreme delicacy of the boric acid 
reaction. If one cubic centimeter of a solution iF ot acid 
gg percept poe — to test paper) be mixed with 10 c. ¢. of a 
5 per cent solu of mannite, a strong acid cg is de- 
slips turning tients paper onion-red at once. A yyy, solu- 
tion of borax, which is neutral, when 2 ¢. c. are mixed with 10 ¢ ¢. 
7. the mannite solution, ie a bright-red at once. Five c. c. of 
& typ 000 SOlution added to 5 c. c, of the mannite solution, gave a 
decided acid reaction at Wire end of a minute. Quantitative ex- 
periments showed that the alkali required to neutralize the acidity 
roduced, was the exact quantity needed to form the mono- 
metaborate.— Bull. Soc. Ch., Il, xxix, 195, 198, March, i 
. B. 
5. On the Products of the Distillation ow, Resins a resin 
Acids with Zine dust.—Ctamictan has studied the products 
From 600 grams abietic acid, 250 cubic a ds of distillate 
were obtained, which on fraction ning, gave toluene, metaethyl 
methyl-benzene, naphthalene, methyl-naphthalene, and methyl- 
anthracene. Colophony itself, when iis distilled gave the same 
products, and in about the same proportion with the exception of 
toluene, which was present in much smaller quantity. On istill- 
ing gum-benzoin with zine dust, toluene, xylene, naphthalene, 
and a ehehaene were obtained.— Ber. Berl. yes te 
xi, 269, 878. 
oily body, having the formula C “HO, fo fo . 
stance with alkalies, and boils at 285°. Treated with acetic 
oxide, it t yields an acetyl derivative C pH (CH.O0. which = 
bromine gives a bromo-compound ©,,H,,Br,(C,H,O)O,. Hea 
to 130° with hydrochloric acid, torrents 8 of. methyl chloride pe 
evolved, and a crystallized body is obtained hav ving the formula 
C,H,,0,. This Sancapie regan as a higher homologue of pyro- 
an ¢ OH 
gallic acid, thus C,H, one the methyl derivative C,,H,,O, be 
OCH, OCH, 
ing C,H, . OCH, and its acetyl compound ©,H,4 OCH, . Since 
: OH OC,H,0 
