TRANSACTIONS Ol*' TUK SUCTIONS. 
73 
Although not wishing to be considered as giving a positive opinion on the chemical 
{edition in which iodine exists in vegetable and animal matter, the author thinks it 
vainrhile to notice, that, notwithstanding the MIM U«Otm8Di being followed, ho 
loled to find any iodine in new and fresh eggs, whilst in rottl »WJf distinct 
,aoiity was detected. Now, whilst it is quite passible, find indeed probable, that 
wme slight and unknown cause, the iodine in the fresh egg* might have 
ouad, yet the author could not help speculating so far an to nay, that the iodine in 
-»frah egg may exist in the free condition, or at least, not in combination with a 
and that when the egg rots, the sulphuretted hydrogen produced may convert 
& .dine into hydriodic aria, which in the presence of the free soda of the egg will 
«me iodide of sodium, a substance very nmak less volatile than iodine itself 
c > parage of iodine from the annual don of 
ut kiiiior, With no expectation of a successful result, hut wishing to be able to 
^Knperiincntnlly on tiie tul ft bjit, Hmrrebi a U /or for 
during which time (about fifty hours) ute air inspired and expin l must 
tome m coutset with the starch. No blue or even rose tint was imparled to the 
^ A 4 '! ““wore no iodine had left the system by that road. Other experiments 
itanu mi Cl v 6 C0m P 0 ' ,n ds form no exception to the general rule, and accura¬ 
cy er ?' Jlle ‘natters in their passage from the aniniuh. 
*,»""“■! derives wluit iodine it requires from the plant, the latter in its 
WwaiitiL' •! tmns ' ts su Pl ll y I* rotn the soil: direct experiments a e still wanting 
rncL' 3 P leB ^" ce tlicre, but the fact of its beiug uniformly a constituent of 
vitrjnuxt ,iecessi talcs, that when these arc present in or applied to n soil, the 
r0l isUo a greater or less extent, contain iodhte. 
Cuuaeefthe Phenomena exhibited by the Geyscrt of Iceland. 
present J . ™ B0M Macadam, Ph\l)., F.C.S. 
^dttl (o though specially bearing on the Iceland (irysers, is also 
•-■tnowle ( ig eo fti ® a . c,0,1,| diu California. The former arc singled out, because 
j’Mu.tly regarding ' MITIC ' V ' ,M extensive, and tto are in a portion to speak more 
; W®iion\p(] a )n r ' ^ causo , or force which mav be urged in explanation of them. 
Willi „ accounted tor live ix'i'n.I.M,..! ,.e l, n t ■<>,,) ulnnm nrn. 
if, ^ ru exists in conn Jr 6 ■ . c Phenomena in question, tlie author assumes 
floor of which is f . 1 t-nch geyser, a subterranean chamber of large 
or ne#l . t j |G ° a i roundish form, anti at a temperature of not less than 
■* ni!^ 8 of ' Vl| ti , r 1 l,v 1 ,'S'* 0 flre fissures communicating with springs or 
fjti or tube wliich »» a »a„.\• 0 J ! ,tcr mn .Y be allowed to flow into the chamber; 
1,e «r the lowest l. t ," H 0,ivit . v to the surface cf the earth, taking its 
* * ti,,? Un,c * (*»« other w2LI1 .° * chamber. \\ i into details, the 
siphon, thn of rS .° U S‘‘. Vam have done) that this tube has the form 
‘^ 0 ft], o 0 " Ser * | mb, n K o 11n .:„° r cr ' imb °t which eomniunicntes with the chamber, 
' f ‘•ntv ^' 4cr ‘ hi the nnf n l0r t Uou ® coUWl *i “t length forms the exit or emission 
"’here, fro- ® 0U|, * B cf events. Water finA. .. t.f ll... fie. lire, into 
tt * t «*tcb? Polled 
<>82 
fcss""* 
^>' 8 er. I„ ft.- f “ lor »«°n8 cotilSr, at length forms the exit or emission 
Vherc , from the V: eve,,t * : » Water tinds access by the fissures into 
“"'polled to ncm, I’ 1 temperature of the matter it falls upon, it is im- 
-in g205“7 F. •pi e * ie spheroidal condition, its temperature while in 
cavity t] lat ' f! _ water gradually accumulates, till at lust so much lias 
-4dal«, < ? vit y that t},,, w,lter gradually accumulates, till at lust so much has 
water hi fl,,or co, > htngor keep the liquid in the 
^ in it, !ll - v ra ist-d to r n os'p C 1 Ue, J c I c to » c lies the stony surface; its temperature 
u nd "'2i .jf to the Z , r , ,7 , r 8 r 'Unities of steam are croner.itcd. This 
J<Siniti S', ul f® encounters water lodged in the 
ji.^ e ®Us«' t Bcdt °thelioilii,t, r. n,Cr P° r, * ohK 1 f steam are condensed, till 
when _ !i ■ steam, , • 
for itself Tl n * *"\ r it from the exit pipe. 
8cvcr,i' ' J * le author ev) r/j mmnder of ll,c s,e ' in ‘ escapes with a sound 
1 S c i'sers niioht S h iL l ! d SC , veral din grams illustrative of the forms 
e su PP 0! 'ed to present. He considered it quite 
