X1 V TABLE OF CONTENTS. 



ENGINEERING Continued, 



Improvement on mi Upper Mississippi Page 385 



Tin-. Madeira ami Mamokk Railway 385 



Tin. Sutro Tunnri 387 



Steam-Motors on City Railways 388 



'I'm Patent Model System 389 



Ship-Canal Pboject on the Seine 391 



Tin Algerian Inland Ska 391 



Flooding ok the Sahara 392 



Another Ai rican Project 392 



The Sihplon Tunnel Project 393 



Draining ok the Zuyder-Zee 393 



Ml-. BLLANEOUS 393 



TECHNOLOGY. By William II. Waul, Ph.D., Philadelphia. Pa 395 



I'm; Dupuy Direct Process 395 



A notiier Direct Process 39G 



Comparison of a Coal-Furnace and a Siemens Gas-Furnace in 



the Manufacture of Plate -Glass 39G 



Telegraphy 397 



The Articulating Telephone 398 



The Phonograph 399 



Electric Lightning 399 



Utilization of Blast-Furnace Slag 400 



Cold-Pknched versus Hot-Pressed Nuts 402 



Iridescent Glass 403 



Miscellaneous 403 



INDUSTRIAL STATISTICS. By William II. Waul, Ph.D., Philadel- 

 phia, Pa 40G 



Production of Pig-Iron in 187G 40G 



( '< >ndition of Blast-Furnaces October 1, 1877 407 



Tin: Comparative Product of Pig-Iron by States 408 



Production of Polled Iron in 187G 409 



Rail Production in 187G 409 



The 1>ksskmer-Stkel Industry 409 



Steel Production Other than Bessemer 410 



Production ok Iron and Steel by the Open-Hearth Process.. 410 



Tin Product ok the Forges and Bloomeries 411 



<.i m ral Analysis ok Total Iron and Steel Production 411 



Tin; Ikon Trade ok the United States in 1877 412 



Com. Trade ok 1877 413 



Prodi < won of 1'k> < k>us Metals in 1877 413 



NECROLOGY 415 



BIBLIOGRAPHY 422 



ALPHABETICAL [NDEX 4G5 



