Automatic Stills For the preparation of distilled water in the laboratories, nothing are quite so handy as the automatic laboratory stills sold by various dealers in chemical supplies. One of the best forms of these is the Jewell automatic water still, another good form is the Rochlitz automatic water still, Fig. 47, made for The … Read more
If the laboratory is so located that coal gas or natural gas is accessible, the problem of heating hot plates and making ignitions simply resolves itself into the use of gas stoves and burners of the simplest types, such as are familiar to every student of chemistry. When, however, the laboratory is located, as most … Read more
Brick Pier Support It is essential that the balance, used for analytical work, should be mounted on some firm support; as, not only does the accuracy of the weighings depend upon the freedom of the instrument from vibration and jar, but also the life of the balance itself. It is equally important, also, from the … Read more
Burette Stand A neat burette table is shown in Fig. 25. It is 32 inches high, 4 feet long, and 2½ feet wide. It has a shallow cupboard below and a narrow drawer. The bottom of the drawer extends only half way across the table, so that it does not interfere with the tubes leading … Read more
In the scheme which we outlined in the opening paragraph of this section, of having a place for everything, it was stated that there should be a separate table for ignitions. The size of this table will, of course, depend on the number of ignitions which are to be made at one time. Ten or … Read more
The one thing about a mill laboratory which is very similar to the college laboratory is the desk or laboratory workbench for general operations which is present in one form or another in every laboratory. If the desk is to be placed in the middle of the room, it is usually a double desk; if … Read more
Upon nothing does the comfort of the inmates of a laboratory so much depend as upon the hood, and it is essential that this should “draw” well in order to carry off the fumes. Simple Laboratory Fume Hood Design Fig. 4 shows the simplest form of hood and one which will draw best of all, … Read more
In most college laboratories and in some large industrial ones the sinks are located in the middle or at the ends of the work benches. In a small laboratory, however, it will be found more convenient to have a separate table for the sink and it will save plumbing to fit this table up for … Read more
In designing and equipping an analytical laboratory, two aims must be kept always in mind—First, to promote accuracy, and second, to economize time and labor. Don’t make the mistake of sacrificing the former unnecessarily to the latter, but always save time and labor when possible and to that end arrange your laboratory systematically. Nothing so … Read more
It is a fair assumption that the main purpose of any diagram is to present facts to the eye in more convenient form than they could be tabulated in figures, and this implies that a screen diagram should set forth in a convenient and familiar form certain facts as to the character of the material … Read more