of Holborn for a moderate outlay.

Another very good blow-pipe is the Automaton blow-pipe of Mr. Fletcher
of Warrington. In this, one tap regulates the supply both of air and
gas, which is a great gain when difficult work is in hand. Automaton
blow-pipes are made of two sizes. I have found that the larger size,
with a powerful bellows, heats large pieces of lead glass very
satisfactorily. On the other hand, the fine-pointed oxidising flame of
the Herapath blow-pipe is, perhaps, the most suitable for working joints
of lead glass. Therefore a good equipment would be a small Herapath
blow-pipe and a large-sized Automaton. If only one blow-pipe is
purchased it should be either a medium-sized Herapath, or the smaller
Automaton, as those are most useful for general work.

Mr. Fletcher also makes an ingenious combination of two blow-pipes in
which the gas and air supplies are regulated by a single lever-handle.
This is very convenient, and gives flames that answer well with tubes
made of soft soda glass, and it is very useful for general work. For use
with lead glass the supply of air is rather too small, and does not
enable one to get such good results. This can be easily amended,
however. By slightly increasing the size of the air-tube of the smaller
blow-pipe, and having increased the supply of air to the larger
blow-pipe also, by reducing the external diameter of the end of the
innermost tube, I now get medium-sized brush flames and pointed flames
with this blow-pipe, that are equal to any I have used for heating lead
glass.

For small laboratories the inexpensive No. 5 Bunsen burner of Mr.
Fletcher, which is convertible into a blow-pipe, will be very useful.

Jets of several sizes to fit the air-tubes of blow-pipes may be obtained
with them, and will serve for regulating the supply of air to the flame.

=The Bellows.=--The usual blowing apparatus is some form of foot-blower.
These may be obtained fitted to small tables with sheet-iron tops. But a
much less expensive apparatus is the large foot-blower made by Mr.
Fletcher of Warrington, which can be used at an ordinary table or
laboratory bench. Good foot-blowers can also be obtained from makers of
furnace bellows.

No part of the glass-blower's equipment exceeds the bellows in
importance. The best blower procurable should therefore be adopted. A
bellows which, when used with a large blow-pipe, will not enable you to
heat large pieces of lead glass tube to redness