Page:Science vol. 5.djvu/39

 r 9, 1885.1

��SCIENCE.

��IriAed wilU black Veuetiaii blinds, whith, wlien drawn, exclude ftll light. The polariscopc, spectroscope, goniometer, photometer, and photographic apparatus are used here.

On the right, next in order, is the first of the three lai^c working-rooms fur students, knoirn MS laboratory A. Its dimensions are thirty by

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��lirty-two feet. The work of those who are

the earliest stages of their course is curried

here. Forty students can be accommodated

thia room at one time without inconvenience.

.tijoining it is a lai^e storeroom, in which the

iheraicals are kept, and the solutions for the

reagent-bottles prepared.

fti the opposite side of the h.ill arc the appa-

ktUs-ofBce and a. balance-room. The' otficc

connected by a stairway with the

re-rooms for apparatus, which are

the basement. All necessary ap-

iratus is loaned to students who sign

reipta for whatever they may take;

and the cost price is charged for any

thing which may not be returnetl in

good condition.

Passing on, we enter laboratory!i, which was the mahi working- room of old laboratory. It measures Ihir- 'ly by forty-two feet, and has places "tor thirty students. Those who work in this room have had some prelimi- nary training. They are here en- gaged in complicated qualitative min- eral analyses, preparations, and quan- titative analyses. The office and pn- vale laboratory of Assoc i ate- Pi-nfesso adjoin this room, and open into it.

The arrangements for sntphnretted hydrt^en

deserve s[>ecial mention. As is well known,

tbis valuable gas is the chief source of dis-

jflorafort in chemical laboratories: and chemists

ill, perhaps, wonder and doubt when it is

��stated, that, in the laboratory under considera- tion, its familiar odor is praclically unknown. This desirable result is readied by providing for it, not a separote room, as is customary. but a separate, thoroughly ventilated building, immediately adjoining laboratory B, but com- pletely isolated from it. It is provided with a high (rbimney, and means are taken which not onlj- ought to, but actually do, secure a con- slant upward draught. It con- tains a large gas-generator, which furnishes sulphuretted hjdrogen, and which is in chai'ge of the janitor, who is required to see that it is kept in order. All work with noxious gases must be car- ried on iu the ' stink-room,' under jjcnalty of the law. The experi- ence of the past year has been such as to lead the writer stronglj' i'LooH. to advise all who have any thing

to do with building chemical lab- oratories to see that they are similarly provided.

Having thus taken a hasty glance at the first floor, we may pass to the second. Here we find the main lecture-ball, with a large prepa- ration-room opening into it. Over the lecture- table, extending uearlj' the entire width of the room, is a lai'ge hood of galvanized, corrugated iron. This is connected with a veulilating- flue, the opening of which is al>out fifteen feet

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��long by three feet wide, extending upwonl through the iX)of. A row of gas-jets may be lighted at the lower end of this Hue, thus se- curing a remarkably efficient venUlation. On the table there is also a closed hootl, and a pipe with down draught.

The library is unusually well supplied. It

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