168 
ed by a particular organization, It ap- 
pears as a yellowish-white matter on the 
last three wings semi-transparent, which 
in the microscope appears organized, and 
consisting of grains confined in a ramify- 
ing fibrile structure, shining brightly in 
the dark. ‘The interior surface of the ring 
is very transparent, but not phosphores- 
cent. The substance is translucid, be- 
comes opaque by drying, and then ceases 
to shine, It is heavier than water. Pre- 
served openly in water, it shines with a 
yellowish-green light for two or three 
hours, and then ceases shining, Heat and 
galvanism re-produce the light as long as 
the substance is not quite opaque. Up to 
106° F. the light increases; at 127° it 
ceases, and the substance is then white 
and opaque like albumen. In a vacuum 
it ceases to shine, but re-shines with air. 
It shines more in oxygen than in other 
gases. When burned it gives ammonical 
results. Concentrated acids extinguish 
the light, aud coagulate the substance. It 
is not soluble in oils. Ether and alcohol 
destroy the light, and coagulate the sub- 
stance. Potassa dissolves the substance. 
Et is not soluble in boiling water, but be- 
comes more consistent in it. From the 
chemical character, M. Macair concludes 
the substance to be albumen principally, 
and the canse of the cessation of light to 
be the coagulation of the albumen, and its 
consequent opacity.—The general conclu- 
sions are,—1. That a certain degree of 
heat is necessary to the voluntary light of 
glow-worms, 2. That aslightly-imcreased 
heat increases the light, but much more 
heat destroys it. 3. That all bodies capa- 
ble of coagulating albumen destroy the 
phosphorescence of this matter. 4. That 
the light does not appear except in gases 
containing oxygen. 5. That the pile ex- 
Commercial Report. 
[Sept. 1, 
cites it, but common electricity does not. 
6. That the luminous matter is principally 
albumen, 
i 
STATE OF THE THERMOMETER AND BA- 
ROMETER IN JULY AND AUGUST 1822. 
Thermometer. | Barometer. 
-- 
Night. , Day. 
Morning. 
July 24 «+++ | 61 71 29°72 
25 scace 60 71 71 
QT seen 57 70 68 
2B eee 44. 57 67 
29 see0 54 74 53 
30 «ees 46 66 55 
31 +:s 36 60 65 
Aug. 1 +++. | 51 62 87 
ERE 50 65 92 
3. 52 65 92 
A sese 49 72 86 
5 sree 47 67 80 
6: 49 66 80 
T vee 53 69 92 
Boveee 44 75 87 
Q sees 45 72 72 
10 see. 52 66 73 
11 eee 55 75 76 
12 ees 53 69 77 
13 «+s 62 72 73 
14 ++ 54 69 84 
15 seee 61 71 70 
16 ++. 60 67 96 
17 - 57 69 98 
18 eece 60 70 97 
19 «+e. 62 72 99 
20 + 59 66 30: 
Q1 +++- 56 81 29°72 
QD asee 60 82 79 
23 cove 60 74 70 
There was a white frost on the grass on 
the 31st of July. The thermometer hangs 
in close contact with the brick- wall of the 
house, outside a two-pair of stairs window, 
MONTHLY COMMERCIAL REPORT. 
—<P_ 
PRICES or MERCHANDIZE,  Ju!y 26. Aug. 25. 
Cocoa, W.I. common -- #2 0 0 to 2 10 2 8 0 to 212 O perewt. 
Coffee, Jamaica, ordinary 418 0 — 5 2 0 | 415 0 — 5 2 0 do. 
Mees SS fie 59100 "5 170 | 5 180" "546.0" do. 
, Mocha .---+-e610 0 0 —15 0 0 110 0 0 —1010 0 do. 
Cotton, W.I.common-- 0 0 73— 0 0 83} 0 O 7E— O O 8 perlb. 
, Demerara:----- 0 0 9 — 0 010 | 0 O 83 — O O 10% do. 
Currants ---+-+-- coosoe 511 0 — § 14° 0°|°5 11 O'— 5 18° O percwt- 
Figs, Turkey +--------- 212 0 — 3 0 0 |] 216 0 — 3 0 0. do. 
Flax, Riga «+++--++++-+53 0 0 — 0 0 O |52 0 0 — 53 O O per ton. 
Hemp, Riga, Rhine ----41 0 0 —42 0 0 [42 0 0 —43 00 do. | 
Hops, new, Pockets---- 3 0 0 — 5 6 01] 3 0 0 — 410 O perewt. 
———., Sussex,do. 215 0 — 310 0 |] 216 0 — 3 5 O do. 
Iron, British, Bars ---- 810 0 — 815 0 | 9 0 0 — 10 © O per ton. 
———_, Pigs -----» 510 0 — 610 0] 600— 700 do. 
Oil, Lucca «-++ss+++e--39 0 0 — 0 0 0/139 0 0 — O O O per jar. 
—, Galipoli------------60 0 0 — 0 0 0 |55 0 0 — 56 O O per ton. 
Rags -+sssecesscoeeee 118 0 — 0 0 0] 2 0 0 — 2 O 6 perewt. 
Raisins, bloom or jar,new 3 5 0 — 000]383 50 — 00 0 do, 
Rice, Patna kind ----.-- 014 0 — 016 0 | 014 0 — 016 0 do. 
——, East India---+.--» 011 @ — 015 0 0110 — 013 0 do. 
