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VOL. XXXVI., No. 8. [NEW SERIES.] _Thirty-second Year_.
NEW YORK, SATURDAY, FEBRUARY 24, 1877.

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CONTENTS.

(Illustrated articles are marked with an asterisk.)

Academy of Sciences, New York. 117
Answers to correspondents. 123
Arts, lost, in New York. 113
Augers and drills (16). 123
Bain, Alexander. 121
Blue glass deception, the. 113
Blue glass science. 121
Boilers for small engines (2,14). 123
Business and personal. 123
Caffeone. 114
Chromate of lime, acid (18). 123
Circle problem, the three (8). 123
Clock collector, a. 119
Coal, burning small (19). 123
Cremation temple, proposed*. 119
Dark days (11). 123
Dates and the date palm*. 111
Diseases, infections. 121
Dyeing process, a cold (9). 123
Engines for boats (12). 123
Floors, filling for hardwood (6). 123
Friction at rest (15). 123
Frost plant of Russia, the*. 116
Glass making, toughened. 121
Greenhouses, tar paint in (3). 123
Harness cockeye, improved*. 118
Heating ranges (17). 123
Heating rooms (7). 123
Hemi-plunger, the.* 115
Hens, Leghorn. 114
Ink, purple marking. 117
Iron trade in England. 117
Laboratory manipulations. 117
Lathe chuck.* 118
Lathe, screw-cutting.* 118
Lead, sea water and. 119
Moneyed men. 122
Mortar, black (10). 123
New books and publications. 122
Ornaments in winter, natural. 118
Papin's steam engine.* 120
Patent decision, a. 115
Patent matters in Washington. 116
Patent office annual report. 117
Patents, American and foreign. 122
Patents, official list of. 124
Planing mill machinery. 115
Posterity, for--a suggestion. 112
Railroad, the Wetli mountain