40 REPORT—1848. 
Time of transit of crest from Alten to Lougan, 144 hours. 
Amplitude of wave in time, 288 hours. 
+ » miles, 3184 miles. 
Velocity of wave, 11 miles per hour. 
We have also the following determinations of the altitude of this wave :— 
dh 
The crest passed Alten.......-..-.Nov. 2 21 
The posterior trough ......+++++-Nov. 8 21? 
Enter @eihs wecwpatay aia ttn vias. = alo > ©.9 uni sale 
» posterior trough.......-.. 29°341? 
5 WAWE at ICC cs ecrceccnce ) kimi, 
Altitude of crest at Lougan .........- 30°109 
; anterior trough ....+...+. 29°038 
wave at Lougan........-. 1L'071 
Nov..2, 21; crest at Alten...sce.ccees 30°618 
5» 2, 20, anterior trough, Lougan.... 29°038 
Altitude of wave from anterior trough.. 1°580 
Nov. 8, 22, crest at Lougan .......--. 80°109 
» 8, 21, posterior trough, Alten .... 29°341? 
Altitude of wave from posterior trough. 768 
St. Petersburgh, which is situated nearly midway between Alten and Lou- 
gan, and not far removed from the line cutting the wave transversely, affords 
us an excellent mean of testing the accuracy of the views advanced relative 
to the great Scandinavian wave. The following table exhibits the progression 
of the crest across Lapland and Russia, and the distribution of pressure on 
each side as it transits. 
ag el tm 5 a a 
Taste III. 
Barometric altitudes and differences arising from the transit of the Scandi- 
navian wave across Lapland and Russia in 1842. 
November 3 to 9. 
re ty lea I 
Date. Alten. Diff. | St. Petersburgh. Diff. Lougan. ; 
Nov. 3. | 30°589™| *317 30°272 1:134 | 29°158 » 
4. *288™| +100 188 "748 *440 | 
5. | 30°140 | +089 *299M *820 “409 
6. | 29°690 | +466 80°156™ 784 “372 
a *416 | °517 29:933™ "159 | 29°774 
8. °596 | °399 995 030 | 30:025™ 
9. "436 | °470 “906 "189 “095™ 
Alten to St. Petersburgh ........ 740 miles 
St. Petersburgh to Lougan ...... 860 ,, 
The readings at Alten are at 3 p.m. 
a » st. Petersburgh, 3 p.m. 
os », Lougan, 4 P.M. 
