at great depths, far from Land. 
299 
Experiments of Forster on the temperature of the sea at dwers depths. 
a fed 
a] Height of the thermometer. 3 & [%s S ,. 
Dat 2 © 21 In the air Surface of |At a certain) § a= one 
ate. é €5 ‘| the sea depth. |, 28 = Be 
+ Fah. | Reau.| Fah. |Reau-| Fah,|Reau.|5 5% | or 
oT a ig BR TUG BSS ae a | OT) oF i? 
1772, Sept. 5,| 0.52 ~. +75,5| +19.3!+70.0/+16.9) 66.0|+15.1) .30 |27 1-2 
a4. 80|+72.5!4+18.0)+70.0!+16.9|+68.0/+15.1, 15 7 
12.|34.48 s. | 100|+60.0|+12.4|459.0/+12.0/4+58.0/+11.6} 20 | .6 
Dec. 15,|55.00 s. | 100/+30.5|-— 0.7/430.0)/- 0.9/434.0)+ 0. 17 | 5 1-2 
23,/52.26 s. | 100/433.0|4 0.4/4+32.0) 0.0)434.5)4+ 1.1) 16 6 1-2 
1773, Jan. 13,/64.00 s. | 100]437.0|4 2.11483.5]4 0.61,82.0] 0.0] 20. | 7. 
Cooke’s d voyage 
Experiments made by Irving, near the North pole with the thermom- 
eter of Cavendish. sa 
isSes Jeees 
= = Gib be a5 Temperature of the ee 
S {888 |S Wa. | seaatthe greatest} 08 i mn 
a 4582 Ss. @ depth to which the} Heat of the 
Date. ie) ey $%—3 | thermometer has; 1 i a 
= ISS58/8252 | beenplunged,cor- ae dads 
§ |Be~u Slo ees cted 
a |G Selb ees Ligbitie mer (ns erage ee ee 
sie eee Fahr. | Reau. | Fahr. |Reau. 
1773, June 20, | 780 | 415° | +11.° 1486.90 | —2.97) (48-05 7.93 
30, m.| 11 +30. ages +31. 0 —6. 4. 
ee +33. 0. +33. 0 +0. 4 1444. 71/4 5 
Aug. 31, | 673 | +22. | +10, 1432.0 459. 
Experiments, made by Dr. Irving, with a bottle, to determine the 
temperature of the sea at different depths. ree 
o§ ori HEIGHT OF THE THERMOMETER. ~-* « 
oS |g Saar alts 
Date. = 3 22 In the air. [Surface of the sea.| Depth in the sea. 
Sok | O 6 * 
Ae |A&) Pahr. | Reau. Reau. | Fahr.| Reau. 
1773. June 1l,|- {82 |¥55.°0)|F10.99"|+51.90"| + 8.04" |+49.90")  +7.°6" 
12,/60.°00'| 65 - - - ~ +44. 0| +5. 3 
July 3,)78. 00) - \+44 0|+ 5. 3/440. 0| + 3.6 - - 
Aug. 4,/80. 30) 60 +32. 0 0. 0/436. 01 + 1.8 139. 0] +3. 1 
: = - 80 |+48. 0O|+ 7. 1/451. 0), + 8. 4 a - 
Sept. 4,/75. 00/683 466. 5|+15. 3)+55. 0| +10. 1 +40. 0) +3. 6 
7,160. 14! 56 |+60. 0 (+12. 4 +57. 0} +11. 1 [+50. 0 8. 0 
bei Vo Phipps to the North Pole. 
