107 
lectors, and we would advise that they be the same length also ; 
for if the brick pit be so built as to receive two or more in a 
line, it becomes necessary that they should thus correspond. 
In form of roof, too, we prefer that they should also correspond ; 
for, although structures of a very similar character have been 
used for years, with regular span roofs, and which always an- 
swered the purposes intended (being entirely conhned to the 
forcing of asparagus and sea-kale) we consider that by giving 
them the same form of roof as the glazed protectors, we shall 
enable the amateur to appropriate them to a variety of objects 
at certain seasons, for which glazed structures are generally 
used ; thus considerably extending the objects of culture. 
We are not aware that they can be made of better materials 
than feather-edged deal boards. We have some span-roofed 
protectors, thus made, which, having been well tarred over, have 
been in constant use for fifteen years, and are now perfectly 
sound. The opaque protectors being made to work with bolt 
hinges, similar to the glazed ones, every facility will be afforded 
for carrying on the necessary operations w ithin. We now pro- 
ceed to tlie consideration of 
Portable Drill Covers. The drill cover is by no means 
a novel affair, and we claim no particular amount of novelty for 
the protectors here described. We would merely urge that 
where structures, somewhat similar, have been used, their pur- 
poses have been so much narrowed as to render them compar- 
atively unimportant; and it will be one part of our labours 
so to extend their scope as to impart to them a much greater 
amount of importance. The drill covers, too, of former days, 
were so small as to be only adapted to one or two crops; we 
are desirous of recommending drill covers which shall be easily 
transferable, and applicable through the year for the produc- 
tion of a variety of dainties, for which, as before observed, we 
must provide a special course of culture, more particularly in 
point of distances in planting and arrangement of cropping. 
Some years ago, a drill cover, of two sloping sides only, was 
recommended by Mr. M'lntosh, as adapted to the protection of 
early Pease ; and is thus described at page 65, of his Practical 
Gardener; — “The front is glazed with small pieces of glass, to 
transmit light ; and the back is composed of a board, the third 
side or bottom is open. Upon the top it will be convenient to 
291. ACCT.VRIUM. 
