144 Notices respecting New Books, 



adopted, and fixed my attention to these alone, as calculated to 

 inspire more confidence in this sort of investigation. 



The results which I have obtained confirmed my remark, by 

 some thousandth parts of sulphur in 100 parts of mass. Cinnabar 

 oifers the greatest difference : — according to Berzelius I have 

 found about a hundredth of sulphur in 100 parts in weight; and 

 according to Seguin it is less by half a hundredth. 



As mv experiments on this occasion may possess some interest 

 on account of science, I have ventured to offer the following 

 table of sulphurets. 



Reduction of 

 volumes. 



Sulphur. Metals. 



1 or 0-918 

 1 - 0-960 

 1 - 1-003 

 I - 1-002 



1 - 0-992 



2 - 2-01? 

 3-045 

 2-913 

 3-986 

 5-130 

 8-036 

 7-03!^ 

 4-027 

 3-967 



3 - 

 5 - 



4 - 



5 - 



XXXVII. Notices respecting New Books, 



A Dissertation on Weights and Measures, and the simplest 

 Means of revising the British System, — said to be from the pen 

 of Dr. Grcgorv of Woolwich, and printed in the 17th number 

 of the British Review, — will be published in a separate pamphlet 

 immediately. 



Early in the Spring will be published by Mr. Newman, Soho- 

 Square, Chromatics; or An Essay on the Analogy and Harmony 

 of Colours; containing elementary Instruction for producing 

 Colours bv Composition in all the Variety of Hues aiid Shades; 

 with a nev/ Theory of their Relations, Arrangement, and Har- 

 mony. 



In this Essay the coincidences of Music will be pointed out, 

 and the whole illustrated by coloured diagrams, &c. 



Mr. Murray's Elements of Chemical Science, secofld edition, 



with 



