210 REPORT—1840. 
On Mr. Bakewell’s Anglemeter. By Mr. J. Hawxrns. 
The instrument was exhibited and explained by Mr. Hawkins, and 
its use in measuring the angle ef dip of the strata, joint planes, &c., 
pointed out. 
On a New Canal Lock. By Mr. Smits, of Deanston. 
The advantages of this invention he stated to be, that the descent 
in each lock would not be more than twelve to eighteen inches—that 
the locks were opened by the passage of the vessels—that the locks shut 
of themselves—that the vessels did not require to stop—and that little 
or no water was lost. The lock-gate is hinged at the bottom; the 
upper portion, which is round, floats at the level of the higher part of 
the water, and is pressed down by the bow of the vessel in passing, 
and when it has passed, rises to its former position. 
On Raising Water from Low Lands. By Mr. FatrBairn. 
The Commissioners for draining the Lake of Haarlem having applied 
to Mr. Fairbairn on the subject, he proposed a method where the water 
is raised by a large scoop, which rises on the descent of a weight, which 
weight is raised by steam power, on the Cornish principle. It is caleu- 
lated to raise seventeen tons at each stroke. Mr, Fairbairn exhibited 
a model in illustration. 
Mr. Hodgkinson exhibited Mr. Clegg’s new Safety Lamp, with the 
protecting wire-gauze of a Davy Lamp. It is surrounded by a trian- 
gular frame with bull’s-eye glasses. 
On an Improved Rain Gauge. By Mr. Tuom. 
It consists of a cylinder two feet long and seven inches in diameter, 
sunk in the earth till the mouth of its funnel (which receives the rain) 
is on a level with the ground surrounding it. Into this cylinder is put 
a float, with a scale or graduated rod attached to it, which will move - 
up or down as the water rises or falls in the cylinder. There is a thin 
brass bar fixed within the funnel, about half an inch under its mouth, 
with an aperture in the middle just large enough to allow the scale to 
move easily through it. The upper side of this cross bar is brought to 
a fine edge, so as to cut but not obstruct the drops which may alight 
on it. ‘There is an aperture also in the bottom of the funnel, through 
which the water must pass into the cylinder, and through which also 
the scale must move; but this aperture requires to be made no larger 
than just to permit the scale to move through it freely. The cylinder 
is firmly fixed in a large flat stone, level with the surface of the ground ; 
in the stone a groove is cut round the gauge to guard it from receiving 
rain which may fall on the stone. The adjustment to zero is performed 
in the usual way. 
