328 MR. EH. H. GRIFFITHS ON THE LATENT 
TaBLe XX.—Stirring experiment No. I., September 17. Temperature of 
bridge-wire = 64°'2 F. 


















8 2 g : . Reading No. of Time of 
Bridge-wire reading. | ‘Time of transit. thermometer If. revolutions. revolutions. 
P.M. millims. ; 
589°8 9 45 16 882°40 0 9 47 36 
590°2 9 48 48 882:40 
590°6 9 52 58 882°42 
591:0 9 56 58 882°42 
591°4 9 59 49 882°40 4000 10 O 12 
| : 
| Means . 590°6 9 52 46 882°41 
Se | 
594-2 10 20 11 882°41 9000 | 10 15 55 
594-6 10 24 39 882-40 
5950 10 28 34 88241 
595-4 10 32 20 882°48 14000 10 31 39 
595°8 10 36 36 882°45 
Means . 595:0 10 28 40 $82°43, 
| 598:7 | ILL. 83 XO) 882:46 
599'1 | 11 6 58 882°42 | 
599°5 Hal dal @ 882 40 27000 11 12 30 
599°9 | 1114 4 882°40 
6003 | 111830 | 982-40 | 
| Weems . 953 | mioe | eave 
602°9 11 48 28 882°38 39000 11 50 15 
603°3 LT 51 52 882°38 
603°7 11 56 54 882°38 
604-1 12 1 44 882°39 42000 1L 59 42 
604°5 12 6 12 882°40 45000 12, 9-9 
| [seca 
4 : | iy Mean time per 1000 = 188°73 
Means 5 603 7 11 57 2 882 39 Hence, rate per 1 sec. = 5-299 






882:41, No. II., = 40°143 C., and 1 millim. of No. II. at 882 = :0501° C. 
1 millim. of bridge-wire (temperature 15°) at 40°1 = -009101° C., therefore, 
millim. of No. Il. = 5°51 millims, of bridge-wire. 
ar 
The times of transit may appear, and no doubt are, very irregular. It must be 
remembered, however, that the rise in temperature between the individual observa- 
tions in each group was not so much as 0°:004C. As this rise took about four 
minutes, it is evident that the time of transit of so slow a movement cannot be accu- 
