Indicators and Test-papers.
Their Source, Preparation, Application, and Tests for Sensitiveness. With Tabular Summary of the Application of Indicators. Second Edition, Revised and Enlarged. 12mo, ix + 267 pages. Cloth, $2.00.

Tests and Reagents.
Chemical and Microscopical, known by their Authors' Names; together with an Index of Subjects. 8vo, iii + 383 pages. Cloth, $3.00.

TRANSLATIONS.

Fresenius's Quantitative Chemical Analysis.
New Authorized Translation of the latest German Edition. In two volumes. By Alfred I. Cohn, Phar.D. Recalculated on the basis of the latest atomic weights, and also greatly amplified by the translator. 8vo, 2 vols., upwards of 2000 pages, 280 figures. Cloth, $12.50.

Techno-Chemical Analysis.
By Dr. G. Lunge, Professor at the EidgenÖssische Polytechnische Schule, Zurich. Authorized Translation by Alfred I. Cohn, Phar.D. 12mo, vii + 136 pages, 16 figures. Cloth, $1.00.

Toxins and Venoms and Their Antibodies.
By Em. Pozzi-Escot. Authorized Translation by Alfred I. Cohn, Phar.D. 12mo, vii + 101 pages. Cloth, $1.00, net.