1820.] Scientific Intelligence. 471 



1 8 volumes hydrogen, 



24 volumes carbon, 



10 volumes oxygen. 

 This is equivalent to 



18 atoms hydrogen = 2-23 5-59 



24 atoms carbon = 18-00 44-72 



20 atoms oxygen = 20-00 49-69 



40-25 100-00 



So that, if the preceding analysis be correct, the weight of an 

 integrant particle of morphia is 40-25. 



The reader will easily perceive that we might consider this 

 substance as a compound of only half the preceding number of 

 atoms, or of 



9 atoms hydrogen = 1* 125 



12 atoms carbon = 9-000 



10 atoms oxygen = 10-000 



20-125 

 On that supposition the equivalent number for it would only 

 be 20-125. Perhaps this last estimate maybe the most correct; 

 but the analyses of the salts of morphia, published by Robiquet 

 and by Pelletier and Caventou, give an equivalent number for 

 morphia not far short of 40. This is my reason for considering 

 it as a compound of 62 atoms rather than of 31 ; either of which 

 is equally indicated by the analysis. 



IX. New Projection of the Sphere. By Capt. J. Vetch, R.E. 

 In this projection the globe is supposed to be inscribed in a 

 cyhnder, the axes of the globe and cylinder being at right angles 

 to each other, and their surfaces, therefore, coinciding at a meri- 

 dian. The eye is supposed to remain at rest in the centre of the 

 globe, and each point in the earth's surface is transferred to that 

 of the cylinder by a right line passing from the earth's centre 

 through that point. The cylinder being then unravelled, a view 

 of the earth is obtained on a plane surface. A sketch of the 

 earth's surface upon this projection has been published by the 

 author, accompanied by a short account of its principles, 



X. Excrement of the Chamaleonis Vulgaris. By Dr. Prout. 



A small portion of the excrements of this animal was given me 

 for examination by Dr. Leacli, It consisted partly of a fine 

 powder, of a bright lemon-yellow colour, and partly of lumps 

 composed of the same powder loosely agglutinated. On exami- 

 nation, it was found to be chiefly composed of the lithate or urate 

 of ammonia, and a little colouring matter. Hence, as indeed I 

 had expected, its composition was precisely the same as that of 

 the urinary excrement of the boa cuustrictor and lizard tribe, as 

 previously ascertained by Dr. J. Davy, and myself. The food 

 of this -animal is said to consist of the lumbricus terrestris, and 

 f he larvai of the tcncbria moljtor. 



