ON THE CONTRACTION AND EXPANSION OF ICE. 425 
TABLE OF OBSHERVATIONS—( Continued.) 
Tem-} 46 .| Average | Average 
No.} Date. | Hour. | pera-|o2 _ per 0° per 0° = Remarks. 
ture. | So 2 per 100. | per foot. = 
69\Feb. 7 11 P.M. | 34° |7 in -000353 | .00000353) ... 
70 & be 35 -000357 | .00000357] 5 Ww 
1 -000360 | .00000361) 8 W |Ice dry. 
Ce COCA ie dresser + |Calm. On the move. 
73{Feb. 8 |12.0 28 i -000320 | .00000321} $ w 
7 | (a a a es -000344 | 00000344} ... [Ice dry. 
ahs Ty 38 ELEVA SR Coane I RS eee 8 W |Ice wet. 
S W |Ice melting. 
Hal oc BD ae a4 : 000353 00000353] Ww 
msl 3 P. 4, & , c oa] W jAverage, .00000341. 
79 : 4 is 34 i -000760 | -00000760 General average, 
80 * 7 32 DOE WORLD Veesenes fie | eevee -. | fromJan.9to3p.m. 
Sty i 8. Saucon | HERO) see |) poe Nw | Feb. 8, (.00000330). 
82 : 9 i 17 0065 | nese | cates NW |Surface water of ice 
83) inl aL Shea teeny UOMO 6 \ecekens, Wee Wleeaecs NW | freezing. 
84/ Feb. 9 12.0 8 Rae tae OOAD AN MMe cores lilLp i teeutecs an 
85 i 3 AM. 6 A 000750 | .00000750} N W |Blowing a gale, 
86 : 6 i Zero. |8 Tn, J -0180 |e | cae N |Average contrac- 
87 8 -000750 | .00000750) N | tion, .00000760. 
88 Oo 9.30 “* 6 ‘ -000666 | .00000666§ N 
89 Se i ia 9 ie -000550 | .00000550} w 
90 Ss 12.0 10 a -000800 | .000008008 w 
a a a P.M. u4 i -000750 | .00000750} w 
9 < SS RROD DONC Ammen g, Wy obeaoe ee 
93 Feb. 10 j1 AM. a6 ii 000900 | .00000900; Calm 
94 ‘ Bivilles PPE a= QUAOLH | idrabeiecn Uh Bes xociees E 
95 “ 8 P.M.} 11 Me -000909 | -00000909} & 
96}Feb.11 |10 A.M.| 12 cf -000833 | .00000833} £ 
BH it) BM} 20) -000750 | .00000750} ... |Note 20° Temp. of 
8 Ms 2 ff. a ie -000791 | .00000791 a drift snow on ice. 
100} Opes 16 SD AB ctreOU LOM thea inlea cs ately tae re oe Nn IS : 
101/Feb. 12 |12.0 TR Nietcaeon| SSL iota Me tome oe N Sulbanitting. ¥ 
102 Sela ALM. | 110 56 -001000 } .08001000) w 
103 bs Picnic: 9 9 in. -000666 | 00000666) w 
104 $ unis 13 ec -000692 | .00000692) w 
105 sf age Ase 19 ss -000684 | .0000068: N 
106 ss 1 P.M,| 23 ss -000789 | .00000789) ... 
ae ie 4 ee a | i -000791 | .00000791) w 
@: Saul min eOUGO |) <a eeaesaneli Unley 2! Ss Ww 
eH Feb. 13 a ae | 6 is uae cOienee E 
. a f -00 -00000765) Ww |Average expansion 
att 3 2 Pa | es | is -000765 | -00000765) £ “00000773. , 
113|Feb. 14 |4 ALM. | 26 | SPE OOSON ni gees lull (ete el a 
4 : S fe 26 | .000770 .00000770] NE 
TB ke Hk PMS 2s -000760 | .00000760} ... 
147 a 3.30 “* 28 i -000786 ! .0000078 
118 10 “ 15 Y -000800 | .00000800) Clear night. 
119|/Feb. 15 |4 A.M.| 12 sf -000750 | .00000750 
120 sf 12.0 20 CG -000700 | .00000700) 
59} 2 P.M.| 20 $5 000750 | .00000750} Nw |Snowing. 
122 Ky By 22, G -000773 | .00000773) n Ww 
123 sf AOE 29 Ef -000793 | .00000793} s & 
124)Feb, 16 |9 A.M.; 18 G -000888 | .00000888} Ss E 
=e ft ea oor “3 10 in. -000861 | .00000861) N & 
-M. SP EE OOM UH hilaseescee [ic Museau NW 
197 4 Ww 16 st -000875 | .00000875) x w 
128 Y Grins 14 * -000850 | .00000850} w 
129,“ Dt LTE 8 re -000750 | .00000750] .w 
180)Feb. 17:16 A.M.] ... ss er syecag ... |Average contrac- 
181 rs 8 “ . j—4 3 -000750 | .00000750) tion, .00000788. 
132 15 P.M. j+14 sé 000714 00000714] N & 
133 bi Si ties 6 i -000833 | -00000833] ... 
ee R “ a , ay fan a 1Lin., -000750 | .0000075: ith sy 
eb. -M.j 12 |) *. F-00900) 1... asd on rough roof. 
136} 1 “ 12 s ..._ {Snowine, drifting 
