Cibil, Mechanical, Military, and Nabal.

Edited by ERNEST SPON, Assoc. Mem. Inst. C.E., Mem. Soc.

Engineers, of the Franklin Institute, and of the Geologists' Association.

The success which has attended the publication of 'Spons' Dictionary of Engineering' has encouraged the Publishers to use every effort tending to keep the work up to the standard of existing professional knowledge. As the Book has now been some years before the public without addition or revision, there are many subjects of importance which, of necessity, are either not included in its pages, or have been treated somewhat less fully than their present importance demands. With the object, therefore, of remedying these omissions, this Supplement is now issued. Each subject in it is treated in a thoroughly comprehensive way; but, of course, without repeating the information already included in the body of the work.

The new matter comprises articles upon

No

Abacus, Counters, Speed Indicators, and Slide Rule ..

I

Agricultural Implements and Machinery.......

I

Air Compressors

I, 2

Animal Charcoal Machinery.....

2

Antimony....

2

Axles and Axle-boxes

; 2

Barn Machinery

2

Belts and Belting ..

2

Blasting. Boilers ..

Brakes...........

3

Brick Machinery

3,4

Bridges

4, 5

Cages for Mines

5

Calculus, Differential and Integral

5

Canals..........

5

Carpentry

5

Cast Iron .. ..

5,6

Cement, Concrete, Limes, and Mortar

6

Chimney Shafts

6

Coal Cleansing and Washing

6

No.

Coal Mining ..

6,7

Coal Cutting Machines..........

Coke Ovens. Copper

7

Docks. Drainage

7, 8

Dredging Machinery

8

Dynamo-Electric and Magneto - Electric Machines

8

Dynamometers..

8, 9

Electrical Engineering, Telegraphy, Electric Lighting and its practical details, Telephones

9,10

Engines, Varieties of

10

Explosives. Fans ..

10

Founding, Moulding and the Practical work of the Foundry....

10,11

Gas, Manufacture of

11

Hammers, Steam and other Power

11

Heat. Horse Power

12

Hydraulics

12

Hydro-geology

12

Indicators. Iron

12, 13

No.

Lifts, Hoists, and Elevators

13

Lighthouses, Buoys, and Beacons.. 13,

14

Machine Tools

..

14

Materials of Construction .. .. 14,

15

Meters ..............

15

Ores, Machinery and Processes employed to Dress

15

Piers .......................

15

Pile Driving ..

15

Pneumatic Transmission .................

15

Pumps ...................

15

Pyrometers ......

15

Road Locomotives

15,16

Rock Drills ....

16

Rolling Stock.....

16, 17

Sanitary Engineering ...........

17,

18

Shafting ...........

18

Steel........

18

Steam Navvy .......

18

Stone Machinery ..

18

Tramways .............

18

Well Sinking ...........

18

E. & F. N. SPON, 135, STRAND.