470 SEVENTH REPORT—1837. 
4th Aug., 1837. WAVE XVII. Depth 4 inches. 
Generated by detached Chamber B. Nimmo op. Volume of fluidadded=785:68 inches. 
Transits observed by the reflected image at the Central Station. 
Observers « Glover, 6 Patrick, y Hamil, } Donaldson—Transit, Russell. 
Statical level observed at 15 is y 42 } Corrected statical depth = 3-78 inches, 
feet. | sec.|@ sec.| y in.) in.|y/in.|2’in,| in. || feet. | « sec.|@ sec.|y in.|d in.|7/in.|3’in.| in. 
0: | 0-0} 0:0/1-S0*) ... | 2°17] ...}.... || 200° | 55:0) 55-5) 0-°80\0-61) 1-02|0-83) 4-71 
40: | 10-5 | 10:5 |2-00 |1-20) 2:37)|1-40) 5-66) 240- | 66-5 | 66-0) 0-67\0:57| 0-89)/0-79) 4-62 
80: | 21-5 | 21-5 |1-10 |1-10) 1-47/|1-10) 5-06|| 280- | 78:5 | 77:5| 0°52/0-52| 0-74)0-74) 4:52 
120: | 32:5 | 32-0 |0-87 |1-02| 1-24|1-22| 5-01) 320° | ... | ... | 0-50) ... | 0°72) ... |4°50 
160: | 44:0 | 44-0 [0°80 [0°65] 1:17|0-85| 4°80)| B60- |... |... | wee | ee | vee | cee | cee, 
4th Aug., 1837. WAVE XVIII. Depth 4 inches. 
Generated by detached Chamber B. Nimmoop. Volume of fluid added= 1127-2 inches, 
Transits observed by the reflected image at the Central Station. 
Observers « Glover, 8 Patrick, y Hamil, } Donaldson—Transit, Russell. 
Statical level obs. at commencement B= — 0:35 } Corrected statical depth =-3°60inches. 
=] 
7yin.|d’in.| in, || feet. | « sec.|@ sec.|y in.|3 in.|7/in.|¥in.| in. 
O- | 0:0) 0:0/8:5* |1-6 | 3-5 |1-95) ... || 160° | 38-5 | 45-0] 1-20)0-40) 1-70/0-75). ... 
40- | 11-0) 11-0) ... JEL |... }:45) ... |} 200° | 55:0) 56:0) 1-10)/0-50} 1-60/0-85) ... 
BOs 20H QMS ise OOD ce (ESO tees, AAO! hos Sende Seats | wae bt oath ow oll | Bae.| Bea 
120° | 31:5} 33°0)1:40 |0-70 1:90)1-05) Sy NVASOT lo ent skis Natur || Soll oma been eed 
feet. | sec.|@ sec-| y in.|3 i 
* This wave reached its maximum height and broke between y and 3. 
5th Aug., 1837. WAVE XIx.* Depth 4 inches. 
Generated by protrusion of solid parallelopipedon C. Volume = 276:3 inches. 
Transits observed by reflection as formerly in the positive wave. 
Transits observed directly, and at successive transits in the negative wave. 
Observers @ Patrick, y Hamil, 3 Donaldson—Transit, Russell. 
Statical level observed at x cn ip ave } Corrected statical depth = 3-95 inches. 
— _ —— | —_ | | I | 
feet: | « sec.|6 sec.|yin.] 3 in.|9/in.|’in,| in. || feet. | « sec.| sec.|y in.|3 in.|>/in.|3in.| in. 
O-0/1-5 |1+4? | 1-60}1-42) ... || 280° | ... | 76-5] 0-60/0-80} 0-70|0-75| 4-67 
40: | ... | 10°5)1°30)1-45 | 1-40|1-40] 5-40|| 320 |... | 88-0} 0:55/0°67| 0-65|0-62] 4:58 
80° |... | 21-0)1-20/1-30] 1-30|1-25] 5-22/| 360° |... | 99-5] 0-50/0-65] 0-60|0-60| 4-55 
120° |... | 31-5/1-10/1-25 | 1-20/1-20) 5-15|| 400- |... |111-0} 0-45/0-61] 0-55|0:56) 4-50 
160° | ... | 42-0/0-95)1-15 | 1-05}1-10| 5:02/| 440: |... |122-5] 0-37|0-52| 0-47|0-47| 4-42 
200° | ... | 52:5/0°70/1-01 | 0-80|0-96] 4-83]| 480: |... |136-5] 0:35/0-49]| 0-45|0-44| 4-40 
240: | ... | 64°5/0-60/0-97 | 0-70/0-92| 4-76|| 520- | See |note*] ... calico facie pate 
* This wave was unusually perfect in its form, and was observed with much precision 
and care; there was no secondary wave. 
