1 Juny, 1898.] QUEENSLAND AGRICULTURAL JOURNAL. 81 
Sommer, however, reckons 15 tons per acre as a fair average crop, and allows 
8 tons of beetroot to 1 ton of sugar. The cropwould pay the farmer well at £1 
per ton for the roots, especially if he got back the pulp for feeding purposes ; 
ut, as the average price of beet sugar is 1897 was only £8 15s., it is obvious 
that the manufacture, at such prices for roots and sugar, would be carried on 
ata loss. A resolution was unanimously passed at the meeting asking the 
Board of Agriculture to exercise supervision over the experiments in the 
growing of sugar-beet to be carried out in many English counties this season, 
and to have analyses made when the roots are ready. 
TO MEASURE THE HEIGHT OF TREES. 
Tur height of a tree may easily and simply be ascertained, on a sunny day, in 
the following manner :— 
Take a stick, say 2 feet in length, and place it upright in the ground. It 
will throw a shadow’ of different lengths according to the height of the sun. 
Assume that it throws a shadow 3 feet long. Now measure the shadow thrown 
by the tree. A simple proportion sum will do the rest. If a shadow 3 feet 
long is thrown by a stick 2 feet long, how long should the stick be to throw a 
shadow 25 feet long ? 
The formula is— 
25x 2 50 
oan 3 
which is the height of the tree. 
Another equaliy simple method is given by E. Coveney, in the Journal of 
Horticulture :— P 
Take three laths, the same as bricklayers use for tiling, and nail them in the 
shape of the framing; B B must be of equal length; 8 and a being placed on 
5 
= 168 feet. 
a 
.* 
a N 
Z ws 
= Ve 
5 < 
° 
1 
iS , 
iy NE 
° a 
5 A 3 
9 ‘ 
3 
BS | a 
Se 
| Xe 
| r 
B we 
Ground. a 
c 
the ground, the eye must follow up the longer lath (d, d, d) until it is in a line 
with e, the top of the tree or object you wish to measure. The frame must be 
placed as level with the bottom of the tree as possible. Should the ground be 
very uneven, you must give and take accordingly. You will see that a to c is 
the same length as ¢ to e, and thus the height of the tree is obtained. 
HOW TO TREAT BONES. 
Tue following information regarding farm methods of treating bones, where 
no crushing-mill is available, has been furnished, iu reply to a query from a 
correspondent to a Melbourne paper, by Mr. A. N. Pearson, the Victorian 
Government Agricultural Chemist :— 
Bones in country districts, where crushing-mills' are not available, may be 
reduced by means of caustic, lye, quicklime, or freshly calcined wood ashes, 
a 
