528 
aed iN aloe ga 
he Hatch 4 
ack Fe and, paper, 
ow Ci 
ly from their. surfaces. 
from the 
the same 
it i ui it‘with € every Mie degree of 
yeloci increasing order, until it 
vel it at of light ; it being probable 
‘that merely caloric, moying with a 
Tes t velocity. 
ie Extraordinary Effeets of Refraction—Cap- 
- tain, William Scoresby; junior, in his nine- 
_feenth, voyages; in 1821, on the northern 
Whale, fishery, when.-at 160 English miles 
-Mistant fromthe east coast of West Green- 
Jandy, distinetly saw;, for several hours’ :to- 
gether, certain cliffs. and coast-lands of the 
_Same,,-of which, himself and, another-per- 
son onyboard took; notes, and made careful 
_sketches,, without being-aware at the time, 
paid to, fhe inaccuracy, of:the charts as: to 
mgitudes,,.of the great, distance they were 
‘om. any land... In: ,his near approach, to, 
a ee of this. part. of the Greenland 
-coast.in 1922,. Capt. Scoresby, was enabled 
arly...to identify. Home’s , Foreland..as 
one ofthe points so observed the year be- 
fo and’ bythe concurrence, as to longi- 
ba of his astronomical. observation and 
bis; chronometers.in both instances, -to 
establish, the, fact of a refraction, so un- 
usually. exceeding one-twelfth of the inter- 
to 8200 of, distance, as to be equivalent 
to, 8,500 feet.in height of the clitis. seen! 
horizontal refraction being. in this case 
34-47” greater, than. its mean quantity, or 
full one fourth of the intercepted are, in- 
stead of one-twelfth. Mr. Hood’s arctic 
obseryations, recorded in page 77, seem to 
offer an‘explanation of the great degree of 
cold: prevailing. when these unusual refrac- 
tions have been observed. |, Another equal- 
ly, or More) Surprising thing happened to 
Captain, Seoresby, ‘junior, whens near to 
Cape. Lister, onthe Greenland coast ; he 
and the crew Saw out to sea-ward, the ‘dis- 
tinct. inverted image of a ship under sail in 
the clear sky, when no ship was in the least 
visible » and, by the aid of a good telescope; 
was. enabled to ascertain, by the number 
and. shapes of the sails, and the general 
rigging of the rial ship, that the Fame, 
commanded by his father, gave rise to the 
appearance; and the circumstances were, 
minutely;so noted:down... And accordingly, 
some days after;. falling-in with his: father’s 
rip, and comparing his journal of sailing, 
the-same was fully proved: to be the case : 
and,the fact: swas ulso: ascertained, that the 
Lame was, sidhe time, seventeen miles be- 
yond; the sun's: visible-horizon, and at a 
direct, distanceof» ear: thirty ‘miles... On 
thet el ole app ou -on some other ocea= 
soit at Goeth 
—_ of Song gp Discovery. 
sions, x Captain, { ae: 
rae of his it nae when thetenion 
f§ #4 caer ein tae 
tions mS caloric, with “n 
ic to, Ja- ° 
. wnt 
ae ies, BRE. ely a ye ‘atte 
the dear att of. Jae a y 
ice floating ‘on’ other distant * 
enable Capt. S. to 4 int 
had to steer, or’ force his Ww: 
soonest: to escape” from’ thie’ ice’ itito’ 
water. i“ a 10 C48 taetone 
¥ idyied at ynistionl 
The. sDateotion’ é Arseriery: 4 iismotes 
Dr. Robert; mire ay 
acceptable.service ;.to» thei, 
publishing, in,.a Jate-.edanbuuigh 
Journal, | the result of, pte serene 
of experiments, ee ee 
erring’ tests, by, ec r meny 3° 
of arsenic dissolved,in 8,00Qyparts,of either 
broth, tea, or coffee, wil anenentengeaneats 
porter, port-wines &Xc¢y-and.taken ip’ 
stomach, .and there,mixed “the.antimal 
fluids,. may -he deteatedys /Stream,of; sulx 
phurated hydrogen: gas thrown.ayp througlt 
the suspected. matter,» previously, diluted 
and prepared according to directions which 
he gives, and. with, whieh; doubtless,every 
medical. man,,-will. aequaint ,himselfpas 
the agent. by. which.this effectivessepas 
ration. of the .arsenie ;is, _performed:s 
precipitated matter is. then, ‘ied lak 
flux added, and as much. of. the omaixture 
inserted into a glass tube, closed atsits 
lower end but open at top, ut ; 
inches Jong aid oad é-fo oe 
inch ‘diameter, as will’ 
half an ‘inch from’ the’ eats 
then is to be heated” wt 
when sorn the arsenic) if 
will be seen linin the | 
tube, witha metalic stéel-! i Alin OF Crust 
the characters of ‘which’ crust ate $0 ire 
nutely described, “dand~ 7 t 
henceforward, it isto be “hope 
culties of medical evidence hye “ery 
guilt more certainly’ puitished;”" 
picions removed front the'inno tho kas 
“ye lee SAY ge 
| The Depth of Water produced by: Dé; 
Vivieres inthe: department: of Ardéche ire 
France, during the year’ 1823, *haseheew 
very carefully ascertained) ‘by MiaeBlau- 
gergues! On 125 ‘mornings: » 
quantities of dew. fell, whicl nevertheless 
amounted to only °242 Frenéh inehesyors 
the 1-152°5th part of «the depth: of» rainy 
which fell there (on: 132:days )» iets ae 
year, and amounted. to:36+-90\4 
least depth.of dew fell in:Marelt ‘ 
andthe greatest, in October: \tadplien eae 
fewest dewy mornings. were; 2:ini Janus 
ary;.and the meosty())}%iny 
Pi is’ areenuentinr sir iprr sooerd 
tifgind’ yfdiemeiopete 
; if (nro 
