,Jr. and C. H. Porter on a New Photometer. 
. Silliman 
B 
318 
i, Il, II. IV. ry 44 
“Fammount,” &| “Dramonn,” oye “ Dramonp,” al a $s | 23 
at at at Marschal & Strat-| % ae lé 
Gas Works. Gas Works. Gas Works. ton’s. “ iss Be 
Preasure 2°40 in. Pressure 2°60 in, Pressure 2-40 in. : g 8 se} 
BURNERS bs ‘ 2 BS | 2 | Bs F S| “ sf S se é 5 38 
. es 2S : a gy ‘e 3 6 3 rl 53 i 
Se] PSE] B ) Eb /2e 3 | 29/88) 2 | 25 el go GE Gel S| a 
sg fle] sl! /8s] | sigs, 0} Bes) Tel Bh gel 81 i°2| 8 
fh |e8| So |#8) 2 | 12 (28) gs 52 e.) siisk 8 biog | Sei.% ES 
23 \38| 1/28] 2 | Gt 88] | 88 |e] s-| et ee) 3 | Saige 2 25 
Sea jos 2 e 4 = 24 3 5 38 3 ; | es < 
8 la'| aa lee] @ jas Se x | 2S 68) & | as GE x | ee l2"] & 13 
Union jet, (Scotch burner,) {19°59 4°9/19°58'4°3 |20°80/24°18/4-8/21°77/22°67 5-2 (22-95|22-07[5°1 1 
Cornelius’ fish-tail, ......./14°39) 5° |14°39/4°3 |20°80/24°18)5-0/22-78)/22-78 5-0 (18°51/18°5115 1 
Soule’s flat top bat-wing, . (18°74) 4° (1717/43 115°48)18°00)4°0/15°49)19°36.4°1 112°41115°1314 1 
Munsig’s single cut bat-wing,) 9°82} 4°510°91/4"  |13°22/16°52/5°2/16-13 150:5 4-6 |12°76|13°8614°6 1 
Batten’s double cut bat-wing,| 10°18) 4* |12°733°5 |18°22/18'88/3'3) 9-48,14-36 3-6 | 9-87/13-70]3 1 
Stratton’s Argand, ......./27'40| 7° |19°6 |6°0 |28°88/24:07/7-0/23: 86.17 046 67 24°02/18-00|7 2 
Heingaldbolie ies 2 slew c+ 5] 15°75 B1°9427°77)5°026-21 26-21 6-0 |20°73|17-28)6- 2-276 
gra. 
Judd’s patent sperm candle, |. 2. [ERT am tlle olan tadte Osde odes sche soles dese ve 
Carcel Lamp, aiie'ks Go ¥s s1 RO” OD 5 Si eas oul Seed Dake waste hile «> sles ees ee qele Se tele 
* Calculated. 
