In order to convert a small bulb of silica into a larger one or into a large tube, proceed as follows:--Heat one end of a fine rod of silica and apply it to the bulb so as to form a ring as shown in the figure.
This is now gently blown out into a small bulb, as in a, Fig.
Care must be taken not to leave knots or lumps of glass in the finished joint, and the latter should be well reblown, and if necessary left as a small bulb or enlargement, rather than have it have too thick walls.
For this reason the two tubes should not be of too near the same size, or if this cannot be avoided, a small bulb should be blown on the end where the joint is to be made.
Here a small bulb b, containing the refractory button m, upon being exhausted to a very high degree was sealed in a large globe L, which was then moderately exhausted and sealed off.
A simple way to improve in this direction is to employ a globe of the required size, but to place a small bulb, the diameter of which is properly estimated, over the refractory button contained in the globe.
To observe the phenomenon it is found best to employ a large spherical bulb having in its centre a small bulb supported on a tube sealed to the neck of the former.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "small bulb" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
