Entry Index: 419
Position: No position
Date by Position: 17 August 1880
Logbook Volume: 3 of 4
Logbook Metadata: Volume 3
No observations Using melted ice Coal consumed during the preceding 24 hours: 110 lbs Coal remaining on hand at noon: 54 tons 438 lbs Max. temperature = 34° Min. temperature = 29.7° The pumping is done as required by hand at the quarter deck bilge pump. Sounded in 38 fathoms. Muddy bottom. A slight W.S.W. drift being indicated by the lead line. Lowered and hauled the dredge. Weather gloomy, foggy and misty. Light northerly and easterly breeze growing very faint and at times dying away entirely. Slowly falling barometer and uniform temperature. Carpenter continues work of altering frames &c of deck house. Water temperatures and specific gravities Surface temperature = 35° - Specific gravity = 1.004 at 43° 2 fathoms = 31° - Specific gravity = 1.0244 at 43° 37 fathoms = 30.5° x - Specific gravity = 1.0254 at 43° x Miller-Casella No 24403 Moon 17° S. First quarter
See full digitized page provided by the Biodiversity Heritage Library. Excerpt:
Our water temperatures and soundings taken daily give no encouragement; the surface has generally a temperature of 34°, due, of course, to its exposure to the sun and retention for a long time of the heat imparted. Two fathoms below the surface the temperature is 31°, and at the bottom 30°. At a temperature of 7 1/2° above the freezing point of salt-water, the lower ice cannot melt rapidly. On the surface, the sun's rays, or the cutting fog, or the warmer water at the edges, make a wasted and rotten material; but under water the ice has the same flinty hardness it had during midwinter. And it is of such irregular and varying thickness that no idea can be formed of its age or origin. We know that last November, when we were squeezed out of the heavy ice into our present location, we were in open water, - a lake, so to speak. By careful measurement we know that ice formed on this lake to a thickness of five feet four inches by February 4th. Then its thickness could no longer be accurately measured, because of under-riding floes; but it is reasonable to suppose that it got a thickness of seven feet. On the 13th July that ice was five feet in thickness; to-day it is three feet five inches thick. Either we have had our summer, or are yet to have it, which latter sounds absurd on this 18th day of August. If the former surmise is correct, three feet seven inches may be taken as the thaw of one summer, and the remaining: three feet five inches will form a basis for next winter. Already our little ponds have frozen over during the night, and remain frozen until noon of the next day. Thus much being said of ice which we have seen grow around us, how are we to discuss ice which is twelve feet, twenty-two feet, twenty- four feet, thirty feet, and forty feet in constant thickness? We see ice which has been piled up in confused masses twenty-four feet above the surface of the water, and can but guess at its thickness below. We drop a lead down to a projecting tongue twelve feet, and think we have the thickness of that floe at all events ; but lo! a little further and we see another projecting tongue, or perhaps a third, or when we get to twenty-two feet we cannot obtain an up and down sounding by reason of surface irregularity.
See digitized manuscript page provided by NOAA PMEL.
Hour |
Wind |
Pressure |
Att'd |
Dry |
Wet |
Sea |
Code |
|---|---|---|---|---|---|---|---|
| 3 | ene | 29.83 | 47.0 | 31.0 | — | — | ocm |
| 6 | ne | 29.83 | 47.0 | 31.5 | — | — | ocm |
| 9 | nexn | 29.82 | 49.0 | 32.0 | — | 35.0 | oc |
| 11 | ne | 29.79 | 47.0 | 32.3 | — | — | ocm |
| 12 | ne | 29.79 | 47.0 | 32.3 | — | — | ocm |
| 15 | ene | 29.78 | 49.0 | 33.0 | — | — | ocf |
| 18 | exn | 29.76 | 49.0 | 32.5 | — | — | oc |
| 21 | e | 29.76 | 49.0 | 32.0 | — | — | oc |
| 24 | ese | 29.76 | 48.0 | 32.0 | — | — | ocf |
