15270. Apparatus for the electrolytical decomposition of hydrochloric acid,
water and ammonia. Complete with platinum electrodes and
support. Each $6.25

15272. Glass parts only, for No. 15270. Each $3.00

15276. Apparatus for the simultaneous electrolytcal decomposition of hy-
drochloric acid, water and ammonia, to show th.at one volume of
hydrogen is combined with on^ volume of chlorine in hydrochloric
acid, with one-half volume of oxygen in water, and with one-third
vo!' me of nitrogen in ammonia. Complete, with supports.
Each $42.00



New York, Boston, Chicago, U. S. A., Frankfurt a/M., Germany.
277




15276-15282



15284, 15286



15278.
15280.
15282.
15284.
15286.
15290.
15292.
15294.
15296.
15298.
15300-



Tube with two stop cocks and platinum electrodes. Each $5.00

Tubes with carbon electrodes. Each $5.25

Supports, with binding screws for the poles. Each $9.00

Apparatus for determining the quantity of hydrogen in one volume
of hydrochloric acid. Complete, with support. Each $7.00



Glass parts only, for No. 15284.
Each $4.00



Apparatus for demonstrating that one volume of chlorine combined
with one volume of hydrogen produces hydrochloric acid. Com-
plete, without battery. Each $11.50



Tube with two stop cocks.
Decomposing cell.
Calcium chloride cylinder.
Cylinder with enlarged top.
Each $3.00

Each $5.00

Each $0.75

Each $1.50



Apparatus for demonstrating that by the combination of hydrogen
and chlorine to form hydrochloric acid there is no alteration of
volume, i. e., that from one volume of hydrogen and one volume
of chlorine two volumes of hydrochloric acid are produced. Com-
plete, with support. Each $5.25



278



Bausch & Lomb Optical Co., Rochester, N. Y., U. S. A.,




15290-15298



iS3i6



15302. Glass tube only for No. 15300.
Each $3.25



15306. Apparatus to prove the invariable composition of hydrochloric acid.
