26 THE FLORAL WORLD AND GARDEN GUIDE. 
by the tenant on the expiration of the tenancy, are also constructed 
on the same principles as those of a permanent character, differing 
only in their portability. 
The system of ventilating horticultural structures patented by 
the Messrs. Messenger is quite unequalled in its way for efficiency 
and simplicity. By a very simple arrangement, the turning of a 
small handle, fixed at one end, or in the centre of the house, the 
whole of the ventilators, from one end to the other, can be instantly 
opened to any desired extent, and as quickly closed again. This 
system of ventilation applies to top and side ventilators alike, and 
may be fixed to existing structures. 
Messrs. Messenger have also introduced a boiler of their own 
invention, which combines the good qualities of the saddle and 
upright forms; and it has been found so thoroughly satisfactory, 
that it has attained an immense popularity, and there are now 
upwards of 3000 fixed in different parts of the country. It may be 
had of any size, heating from 300 to 3000 feet of four-inch piping. 
Messenger’s Hlastic-jointed Pipes are an immense improvement on 
those of ordinary manufacture, for, as the pipes are joined together 
with nuts and screws, an apparatus can be fixed in a tithe of the 
time required in fixing an apparatus when the joints are made with 
yarn and red lead or iron filings; consequently, a considerable 
saying of labour is effected—a matter of no small importance at the 
present time. But their chief value consists in the fact, that a 
small apparatus can be taken down and refixed in a few hours, 
without injury to the pipes. With pipes fixed in the ordinary way, 
it is very difficult and laborious work to refix a few pipes, because 
of the difficulty experienced in taking out the packing of the joints, 
and in removing this the joints are often broken, and the pipes 
rendered useless. But with the elastic joints it is only necessary 
to turn a few screws to separate the pipes or put them together 
again. We consider them of the highest value, for, with the 
assistance of an intelligent labourer, the amateur may, if so disposed, 
fix the pipes without the assistance of skilled workmen. Accom- 
panying these remarks are a few illustrations of the simpler forms 
of structures erected in various parts of the country by this firm. 
These have been selected as alike suited to the requirements of the 
amateur and the practical gardener, for each of the structures is 
well adapted for the purpose for which it has been designed. 
THE WORCESTER NURSERIES OF MR. RICHARD 
SMITH. 
HERE are but few plant nurseries in the British Islands that equal in 
extent, and appointments, and management, those of Mr. Richard 
Smith, in the immediate suburbs of the city of Worcester. Any one 
unaccustomed to the commercial aspect of the plant trade would expe- 
q _Tience a difficulty in believing that the vast plantations here are 
designed simply to meet the regular and normal requirements of the mariet, so far 
as this particular nursery is concerned, for it might‘be reasonable in such a case to 
conclude that trees are grown here for hop-poles, for mine struts, and for the 
turners to cut into bobbins for the Manchester manufacturers. But the trained 
