414 
On Cupellation with the Blowpipe. 
for gold is 2577-667 grains, and for silver 1382-72248 grains.* 
represents any diameter 
whether a wh 
ole number or fraction, 
W the weight required. Logarithms are easily applied, and 
Log. W=log. C+3 log. D. 
save much labor. 
Table bie 3 the Weights of Spheres of Gold and Silver of 
ch. 
ed diameters, of fractions of an inc 
Diameters of plana Bho i of spheres sof Bs peel? Weights of spheres 
sqpene i; cale set) €xpressed in grains, ppperes A on sector expressed in grains. 
oo Teg Pind For gold. |For silver, Decimal) Vulgar ja iach | poy gold. | For silver. 
} a i 2577 667 1382 7224) ‘Co72-| Tee 29 (9) 0009808 0-0005261 
zo ee Le 2 57766 |1-382722 0069 | 145 28 00008814 |0°:0004728 
rz4 : alge 0-706 0067 | t£5 27 {00007951 |0°0004265 
| Ze |. - 0°62931 |o-33757 | 0065.) zhe 26 —_|0-0007197 (0°0003860 
| reg] - (0799677 |o-29866 | -0062 | rE0 25 jo-0006293 [00003375 
o| gig | 200 032221 Jo-17284 | -oo60 | i¢¢ 24 {0'0005635 \0°0003022 
gs 170 ©|0°16497 |0-0884 57) <4 23 -{0'0004978 |0-0002670 
lo-o300} gy | 121 0069618 .0-037333 | -0055 | zd, | 22 |o-0004347 |o-0002331 
250} zy | 100 0'040276 o-021605 | -o05a'| zgy | 21” Jo-o003758 oa002015 
30 | 80 or1061 | ‘0050 | sade 20. {00003222 |o-0001728 
166) gi | 666 bia sagitie oo64or5 "0047 | otg 19  |0:0002783 jo-o001493 
seh! 6. e 59305) 0045. | sy 18 |o-0002355 |o-9001263 
42|. zy 5g 207515 ended 0042, ote 17 jo'0001986 (o-0001065 
0°0133) 745 | 53 |0°006110)\0-0032775} -o0f0 | ohy 16 |o-0001649 00000884 
00125) gh | 50 |0°005034/0-0027006] -0037 | 5 = 15 |o-0001368 |0-0000734 
OrolIg aed 48 0°004474 4 35 | ods 14 |o-0001113 |0°0000997 
oort7| yt | 47 |0°004295\0-002251 | -o032 | =, 13 |0-00008g0 |o'0000477 
O°OTIt| gg | 44 |0°003535\0-001896 | -0030 | giz 12  |o-0000682 0°0000374 
00105} giz | 42 |0:003006\0-001612 | -0027 séz II }0°0000538 |0"000C 
oor0e| thy | 40 |0°002577/0:001382 | ‘0025 | phy | 10 — jo-oo004o2 | 0000315 
00097/7h74| 39 |0°0023g3|0-001283 | 0020 | hq | 8 —_jo-0000206 jo-o000110 
070095 és 38 }0°002226)0-001194 | ‘0016 séo 66 |0:0000119 0-0000064 
0°0093\ 7574 37. |0°002075}o-001113 | 0014 rey 5-4 |0:0000075 jo-0000040 
oro0gt| zto| 36 1936|0-001038 | -oo12 | gdp . /ex00000503}0"00000269 
0°0088/yt74| 35-7 |o-oo18rojo- i} :00tt| ghey 000000353}0'00000189 
0°0087| ¢tg | 35 |0°001694lo-o00909 | 0010 | zalrg 6:00000257|0/00000138 
0°0083| +4y | 33:3 |0-:001491/0-000800 | -0008 tz00 0°000001 49|0"00000079; 
o zis 32 |0°001319)0-000707 | -0006 argh: 0 00000062 o-00000033) 
0'0077| rz | 31 |o-001200J0'000644 | +0005 | zohyx ©°00000032|0"00000017 
jo-0075; t35 | 30 95lo:000587 | 0-002 | yak, 0°000000160°00000008: 
Jackson C. H., Ohio, March 3d, 1847. 
* It has been shown in a Ree Re note, 
weigh 2640-8 grains. he sphere 
. 0-5036 — 1382-72248 grain 
and a sphere of the same weighs 
sphere, :: 1: » for she! dbdbataoat a hacia = $rRS= 
‘diameter is unity, +; (aya met 5236. 
a 
he cub 
of the same diameter oni wei ineeey 
of old of one ger weigh a i 
i e nts of a cube : that of ao 
when the 
