406 



SCIENCE 



[N. S. Vol. XXV. No. 637 



The Synthesis of Naphthotetrazines from 

 p-Diaminoterephthalic Acid and Belated 

 Compounds: M. T. Bogert and J. M. 

 Nelson. 



The diphenyluraminodiaeetyl deriva- 

 tives of p-diaminotereplithalic diethyl 

 ester, and the corresponding diacetdian- 

 thranil were prepared. These were con- 

 densed with ammonia, and some of the 

 aromatic and aliphatic primary amines, 

 and the corresponding naphthotetrazines 

 obtained. 



Diphenylbronimethylamine : P. J. Moore. 

 The Basic Properties of Carbon: J. F. 



NORRIS. 



The fact was brought out that certain 

 derivatives of methyl alcohol show the 

 properties of weak bases. Triphenyl- 

 carbinol is converted by concentrated 

 aqueous solutions of hydrochloric, hydro- 

 bromic, and hydriodic acids into the cor- 

 responding salts. Tertiary butyl alcohol 

 also shows this property. Tritolycarbinol 

 is changed into tritolymethyl chloride by 

 dilute hydrochloric acid, and readily forms 

 a nitrate with nitric acid. The ethers of 

 these earbinols are converted into the 

 chlorides of the substituted methyl radicals 

 by aqueous hydrochloric acid, and the 

 ethers can be formed by the action of a few 

 drops of dilute hydrochloric acid on an 

 alcoholic solution of the earbinols. 



INDUSTRIAL CHEMISTRY 



A. D. Little, Chairman 

 When is Time of More Value than Refine- 

 ment of Method? Mrs. Ellen H. Eich- 



ARDS. 



The purpose of the investigation was to 

 ascertain the practicability of shortening 

 and intensifying quantitative methods of 

 investigation in sanitary and industrial 

 chemistry so that they could be intelli- 

 gently used by high school pupils. The 

 results were promising enough to be ex- 

 tended by other laboratory workers, and 



the purpose of the paper was to urge more 

 attention to ways of interesting the public 

 in order that research may be more fully 

 supported by non-scientific business men 

 and state and city officials. 



A Rapid Method for the Determination of 

 Calcium in Water and its Significance 

 in Connection with the Analysis of 

 Water for Boiler Purposes: F. E. Hale. 



Air Elutriation of Fine Powders: Aller- 



TON S. CUSHMAN. 



In order to study the influences of fine- 

 ness of the particles on the rate of decom- 

 position of rock powders when acted on by 

 water, it has been necessary to devise an 

 air separator for use in the laboratory. 

 By means of a simple apparatus in which 

 both blast and vacuum are employed, it 

 has been possible to easily separate 

 powders that have passed the finest meshed 

 sieves obtainable into four or five graded 

 sizes. A 200-mesh rock powder invariably 

 contains a certain proportion of particles 

 that may be called ultimately fine, having 

 reached the mechanical limits of possible 

 subdivision. If these smallest particles 

 can be separated interesting investigations 

 can be made on the influence of the maxi- 

 mum surface area for unit weight, when 

 the powders are acted on by water. 



The Relation between the Ultimate Com- 

 position and the Physical Properties of 

 Portland Cement: Richard K. Meade. 



The .Available Hydrogen of Coal: S. W. 



Parr. 



The fundamental proposition is based on 

 the idea that the original substance from 

 which coal has resulted was made up of 

 substantially the same sort of material and 

 the 'products of decomposition represent a 

 progression which at any given stage in 

 any case bear a constant likeness of com- 

 position at the same stage in another case.' 

 By selecting, therefore, a proper unit of 



