12 E, Loomis—Cbservations of the U. S. Signal Service. 
generally occur first near the surface of the earth, and they 
occur later as we rise above the surface, the retardation amount 
at which this wind was observed. 
Comparison of winds at the base and summit of Mt. Washington. — 
On the summit of Mt. Washington. | Surface winds from the East. 
Wind. Duration. H’rs. | Began. Eade 
1| S.toE. |May 2,2 P.M. to May 3, 6PM. | 29 1 h’rs earliest, 4 h’rs latest. 
1 .to EB, |May 9,1 a.m. to May10,4 pm 40/111“ “ |2 “ earliest 
3 8 May ll, 1laM.toMay12,5am/19 12" “ |g “ earliest. 
4 8 y 21,11 a.M. to May 21,4P.m 104%. oS ae 
5 as May 26, 10 to M. 26, M.| 2 |/Uncertain. n. 
6 |S.E. to N.E. June 7, 7 P.M. to June 10, 11 a.m.) 46 Variable. Variable 
7 N.E. ‘June 13,2a.m.toJune13,84.m.| 4 |/6 hr’s earliest.| Uncertain. 
8 | S.toS.E. \Junel4,1p.m.toJunel5,1am)10}6 “ “  |2 b’rs late 
9 |S.E. to N.E.'June 22, 9 pu. to June 25, 3 Px, 36 |\Simultaneous. | Variable. 
10 S. June 29, 6 P.M. to June 29,9p.,| 4 | Simultaneous, |Variable. 
In the case of Nos. 6, 7, 8 and 9 the interval named in col- 
umn 3d exceeds the number of hours mentioned in column 
4th, and includes several hours of calms, besides a few hours in — 
which there was a feeble wind from the N. or W. points. Col- 
umn 5th shows when the surface winds began to blow from S, 
S.E., E. or N.E.; and column 6th shows when these winds 
changed to north or west. The time here given for the change 
| 
6th denotes that the surface winds were feeble, and fluctuated — 
for several hours between east and west. 
t will be noticed that during the entire period of the baro- 
