0 
n 
REPORT—1854. 
probable that some points in their arrangement might require to be altered, and what 
he wished specially to impress on the Association was, that the spheroidal condition 
of water afforded a means of accounting for the occurrence of the intermittent hot- 
springs generally denominated Geysers. 
On the Presence of Lead in Hydrochloric and Nitric Acids. 
By Stevenson Macadam, Ph.D., F.C.S. 
In the course of some anulysos, made with the view of determining, if possible, the 
presence of lead in animal organisms, the author saw reason to suspect that the acids 
employed by him might contain lead. On testing these, which were the purest to 
be purchased from the manufacturers, small but very distinct indications of lead were 
obtained. In commercial or impure specimens of hydrochloric and nitric nciih, th* 
lead is much more abundant. The importance of such a discovery in reference to 
searching for metallic poisons in organized tissues is so great, that the author would 
caution analytical chemists against the use of the acids for such purposes, without 
previously testing them for lead. 
On the Preservation of Milk. By the Abbe Moigno. 
lliis was a description of the process invented by M. Mabbru, which consist* in 
expelling the air und gases from milk by heating it in tinned or glazed iron cylinder* 
to a temperature of 217°, in an atmosphere of steam. 
v , / , 9,'Bt uuu M. was uiereioie necussswj 
„ . , 1 uc u * rimy believed this was owing to its containing manganat* 
L n . Ji t a / nU | P 8S compound than the first-named salt, and that they b 
ound t hat a solntion prepared either from crystals of the pure permanganate of pd" 
mnnLn i metlu " 1 «r Gregory,—care being taken in this case that the whole of ' 
manganate waa converted into the pcr-salt-would remain unaltered during a Pg»J 
J, y T n i U .'% 1 "T n,so showed that the method at present adopted for fi» n l 
in dar d of such « solution, by dissolving iron-wire in hydrochloric acid, WJJ 
I ' T”® mu,l > fr ««a the reducing action exerted by the impurities in the «"> 
this purpose rmaDgUUntC ’ an< * ^ lat was necessary to employ pure peroxide of iro 
I he} gave several other details connected with the employment of this test. 
On the supposed influence of the Hot-Blast in augmenting the quantity of 
Phosphorus m Cast Iron. By David S. Price, Ph.D., F.C.S. 
whicli consist! a' * >R,C . E communicated a paper on a new method of 
bownoS r nl ' aU y i of th . e following‘-To the alkali under earning* 
carbonic acid tb» ° normn ] solution of oxalic acid is added, and alter exp “ t j flr d 
“Eon alni! P XC °” of , thc OXi «lio ««<! is determined by means of a 
alkalies the imnnrir' ^ ,. t lls n,ct * 10( l when applied to the testing of con ’ 
as the impurities esl 'matcd and the alkali indirectly, and 
the valuation of tb '. anu ^ ^ far the smaller proportion of the coiumercia • b 
.hi, SCtM g po ' ,cr “ mm A -d * 
