234 Scientific Intelligence. [Sept. 



Animal matter and water 35 



Phosphate of lime 61 



Carbonate of lime with traces of phosphate 

 and carbonate of magnesia 4 



100 



Human bone consists of cartilage, blood-vessels, &c. 33*30 



Phosphate of lime 51*04 



Carbonate of lime o.nd phosphate of magnesia 12*46 



Fluate of lime 2*00 



Soda, muriate of soda-water, &c 1*20 



100*00 



Hence it appeared to contain a larger proportion of phosphate 

 of lime and a less proportion of carbonate of lime than human 

 bone, the analysis of which, according to Berzelius, is placed 

 with it by way of contrast. 



This bony mass is now, I believe, in the museum of the Royal 

 College of Surgeons. The case occurred to my friend Dr. 

 Elliotson, and is related in the Annals of Medicine and Surgery, 

 vol. i. p. 129. 



X. On the Gas Blow-pipe. By Mr.. Leeson. (With a Plate.) 



(To Dr. Thomson.) 

 SIR, Nottingham, Aug. 11, 1819. 



Knowing the great utility that the gaseous blow-pipe possesses, 

 and the advantage it would prove to science and the arts, were it 

 not unhappily counteracted by its great liability to explosion, I 

 have ventured to send you a description of one which I am in 

 hopes will prevent that danger. It is, you will see, merely an 

 endeavour to improve upon the various plans recommended in 

 your work, which, if it is found to answer the purpose, will 

 fully reward my pains, and be, perhaps, of some service to 

 others. 



A B, fig. 6 (Plate XCVI), is a box having a division in it. 

 The division A is half the size of the division B, and is intended 

 to contain the oxygen gas. The division B is to contain the 

 hydrogen ; both which gases must be introduced by means of 

 the syringe, which is to be fixed to each apartment, and which 

 might, to save time, be connected by a cross bar, F, as in fig. 7 : 

 c c are two tubes to convey the gases from each apartment 

 which enter one common tube at g, and then pass through a 

 piece of cane at d ; e is a stop-cock to regulate the quantity ; 

 o o are the condensing syringes. Should this contrivance not be 

 thought sufficiently safe, two more pieces of cane might be 

 introduced into the pipes c c ;• or instead of that, some ingenious 



