(Illustrated articles are marked with an asterisk.)

36[Alum in baking powders]376
36[Alum in bread]376
30[Argonaut, or Paper Nautilus]*375
38[Astronomical notes]377
NQ-05[Babbitt metal, to make] [5]378
NQ-06[Belts, rubber, slipping] [6]378
22[Bench, saw, Casson's]*374
NQ-08[Boot polish liquid] [8]378
NQ-16[Butter, to color] [16]378
1[Canal, ship, Belgian]*367
17[Economy, machine shop]371
33[Eggs, preservation of]375
21[Electric light, Werdermann]*373
3[Engineers, warning to]367
NQ-48[Engine, steam, valve yoke] [48]379
NQ-57[Exterminator, roach] [57]379
NQ-19[Filter for rain water] [19]378
14[Foot power, new]*370
6[Glass, iridescent]368
32[Glass, to make a hole in]375
NQ-42[Hair, to prevent falling out] [42]379
39[Inks, sympathetic]377
18[Invention, reward of]371
15[Inventions, new],370
43[Inventions, new agricultural]377
26[Inventions, new mechanical]374
23[Inventors, bait for]374
2[Iron and steel, preservation of]367
NQ-43[Iron, malleable, to make] [43]379
11[Leaves, culinary uses for]370
NQ-36[Line, straight, to draw]* [36]379
16[Mechanics, amateur]*371
35[Mexico, progress of science in]376
28[Microphone as a thief catcher]375
44[Naphtha and benzine]377
42[Nitrate of silver, reduction of]377
45[Notes and queries]378
19[Oil notes]372
41[Petroleum and gold]377
4[Petroleum, progress of]368
25[Poultices]374
27[Quinine, effects of on hearing]374
NQ-02[Railroad, first in U. S.] [2]378
7[Rails and railway accidents]368
20[Railway notes]373
8[Sanitary Science in the U. S.]369
NQ-04[Screw heads, blue color for] [4]378
34[Sheep husbandry, American]375
12[Shutter fastener, new]*370
24[Silver mill in the clouds]374
31[Spider, trap-door]*375
13[Sprinkler, garden, improved]*370
NQ-03[Telescope, sunshade for] [3]378
NQ-55[Tools, steel, to temper] [55]379
29[Tree, tallest in the world]375
37[Tree trunks elongation of]376
9[Trees, felling by electricity]370
NQ-51[Tubing, to satin finish] [51]379
10[Vise, an improved]*370
NQ-14[White lead, to test] [14]378
40[Wire clothing for cylinders]*377
5[Work, the limit of]368


THE BELGIAN SHIP CANAL.

The ship canal from Ghent to Terneuzen was originally laid out with many bends, rendering navigation difficult; it had a depth of 14 feet 4 inches and a width of 98 feet 6 inches at the water level. The works which are at present in course of execution have especially for their object the deepening of the canal to 21 feet 3 inches, with a width of 55 feet 9 inches at the bottom and 103 feet 9 inches on the water line. The slopes have a uniform inclination of 1 to 3, and the towing paths on each side are placed 6 feet 6 inches above the water level, and are 32 feet 8 inches wide. In many instances also the course of the canal has been altered and straightened for the improvement of navigation; several important diversions have been made for this purpose. The excavation has been effected by hand, by dredging, and by the Couvreux excavator, figured as below in Engineering.

The earth excavated was carried to spoil, and in many cases was employed to form dikes inclosing large areas, which served as receptacles for the semi-liquid material excavated by the dredging machines with the long conductors; the Couvreux excavator used will be readily understood from the engraving. It had already done service on the Danube regulation works. The material with which it had to deal, however, was of a more difficult nature, being a fine sand charged with water and very adherent. The length of track laid for the excavator was about 3 miles along the side of the old canal, which had been previously lowered to the level of the water.

EXCAVATOR ON THE GHENT AND TERNEUZEN SHIP CANAL BELGIUM.