453 
THE GEOLOGIST. 
spot, and found our anticipations more than realized ; for it turned out to 
be the tusk of a " great Mammoth," such as is very rarely found in this 
country. 
The specimen is in a fine state of preservation, and measures 2 feet in 
circumference, and 9 feet in length. It lay at the bottom of a very old 
drift-gravel, and on the true bed of the Keuper marl, at a depth of 
11 feet from the surface. 
It is very interesting to find Mammoth bones on the virgin-surface of an 
old formation, as it establishes to my mind, beyond a doubt, the existence 
of the Mammoth before the " drift." 
Some have doubted whether the Mammoth really was an inhabitant of 
this country ; but this has been long set at rest ; and here is undoubted 
evidence of the fact of its local existence. The specimen is very little 
water- worn. 
I do not know that any further remarks are necessary. The specimen 
in the course of this day will be lodged in the Leicester museum. 
I am, dear Sir, yours very truly, 
Feancis Deake, F.G.S. 
30, Market St., Leicester, 27t7i Oct., 1863. 
Geological Section MaJcing. 
SiE, — Perhaps you may think it worth while to mention in your journal 
a very simple contrivance which I devised for the purpose of laying down 
the contour of a piece of ground, of which I desired to make a geological 
section. From its extreme simplicity, combined with very tolerable effi- 
ciency, I think it would often be found useful where mathematical exact- 
ness is not required. 
A B is a. square piece of board, 
— accuracy of form is immaterial. 
It may be of any size, say six inches 
square. -E" is a piece of lead, bent 
so as to embrace the lower edge, 
and capable of being made to slide 
tightly aloug it. 2) is an awl pass- 
ing loosely through a hole at C. 
P P are two common pins, stuck 
into the upper edge of the board. 
To adjust tliis instrument, itis only 
necessary to slide the weight along 
the edge of the board, until the heads 
of the two pins rest in a horizontal 
line, when it is suspended by the handle D. This may be done either by 
fixing a mark at the level of the eye, and looking at it from a little dis- 
tance along the line P P, taking care that the feet are on the same level 
as when fixing the mark, which may be ensured by standing on the shore 
of a pond or the sea ; or else the adjustment may be effected by sliding 
the weight until the same point of a distant object is seen along the line 
P P, when the two pins are interchanged by bringing first one and then 
the other next the eye. 
The proper position of the weight having been determined, the instru- 
ment is ready for use. 
Suppose the contour of a hill desired. Take your stand at the lowest 
point at which the section is required to commence ; hold one of the pin- 
