496 
Report on the Exhibition of Implements 
trial than either time or the condition of the land permitted at 
tlie meeting. The charge of comparing and reporting on their 
respective merits has been undertaken by the Duke of Rich- 
mond, Captain Spencer, and Mr. Jaques, who will use them 
in succession. 
Model Map. — The silver medal was awarded to Mr. John Bailey 
Denton, of Southampton, for a highly ingenious and well executed 
map in relief, showing the superficial variations, water- courses, 
levels, &c., of an estate or district. An ordinary paper map can 
only represent truly a flat superficies ; and, however well it may be 
executed and shaded, such a map cannot convey to the mind any 
correct idea of undulations, depths of water- courses, relative 
levels, or the general configuration of the country. Neither are 
sections of much aid in enabling a landed proprietor to seize and 
retain in his memory a correct image o'f all those terrestrial phe- 
nomena by which many of his agricultural operations must be, 
and are in reality, governed. The multiplicity of sections requi- 
site to denote such data at a glance would only tend to confuse. 
It has been Mr. Denton's object, in contriving the raised map 
submitted to the Society, to place under the eye an exact minia- 
ture model of a farm, estate, or district, so that it shall represent 
the minutest difference in level, and carry on its surface a pictorial 
Jac simile of its character. He has succeeded in giving to the 
surface a coating which renders his model map impervious to 
water ; and he represents it as proof against shiinking, cracking, 
or warping. In fact, it carries water when poured upon it, by 
means of which and of simple accompanying instruments, the 
discovery of every hydraulic fact, as touching outfalls, the proper 
courses for drains, the capability of distributing water collected 
by drainage, or of employing it as power for farm uses — as has 
been so skilfully accomplished by Lord Hatherton — will be 
greatly facilitated. The surface is coloured in oils, and therefore 
admits of its displaying a picture of the particular use or culture 
to which the various divisions of an estate or farm may, at any 
time, be appropriated ; and a simple method is applied of record- 
ing the geological stratification as ascertained by boring. Mr. 
Denton states the price of completing these maps at from 2s. 6d. 
to 3s. 6d. per acre. In awarding the Society's silver medal for 
this invention, the Judges have looked at it not as a mere orna- 
ment or toy, but as an useful auxiliary to the agriculturist, by 
assisting him in the record, study, and full comprehension of the 
phenomena of that surface and subsoil upon which his art and 
capital are expended. 
Drainer's Level — An instrument for assisting workmen in 
giving an uniform fall to drains was exhibited by the inventor. 
