six wheels coupled, and 36 tons
adhesive weight; as originally constructed they had ordinary fire boxes
for burning anthracite or wood; cylinders 18-1/8 in. diameter and 24 in.
stroke; slide valves, outside lap 1-1/16 in., inside lap 3/32 in., maximum
travel, 4-9/16 in.; Stephenson link motion; boiler pressure, 120 lb. per
square inch; six wheels, all coupled, 4 ft. 3 in. in diameter; distance
between centers of leading and middle wheels, 6 ft. 2-3/4 in.; between
middle and trailing, 4 ft. 9-1/4 in.; total length of wheel base, 11 ft.;
weight empty, on leading wheels, 12.041 tons; middle, 10.782 tons;
trailing, 10.685 tons; total weight, 33.508 tons empty; weight in running
order, on leading wheels, 12.563 tons; middle, 11.885 tons; trailing
12.790 tons; total weight, 37.238 tons in running order. Tubes number 151;
outside diameter, 2-1/8 in.; length between tube plates, 13 ft. 10-1/8
in.; outside heating surface, 1,166 square feet; fire box heating surface,
82 square feet; total heating surface, 1,248 square feet; fire grate area,
17 square feet; tractive power =
65 per cent. of boiler pressure x (cyl. diam.) squared x stroke / diameter of wheels
= 0.65 x 120 x (18.125) squared x 24 / 51 = 5.383 tons. Ratio of tractive power
to adhesion weight = 5.383 / 37.238 = 1 / 6.9.

_Tender._--Contents: water, 310 cubic feet, or 1,933 gallons, or 81/2
tons; anthracite, 600 poods, or 10 tons; or wood, 11/2 cubic sajene, or
514 cubic feet; weight empty, 13.477 tons; weight in running order, 28.665
tons; six wheels.

* * * * *

_Petroleum Refuse--Comparative Trials with Petroleum, Anthracite,
Bituminous Coal, and Wood, between Archeda and Tsaritsin on Grazi and
Tsaritsin Railway, in Winter Time._

-----+---+-----+------+---+-----+------+-----------+-------------+------+------------
| L | | | | | | | |
| o | | Train | | | | Consumption | |
| c | | alone. | | | | Including | |
Date.| o | | | | | | Lighting up.| |
1883.| m | |----+-----| | | | | Cost |
| o |Train|Num-| | Dis-| Car | | | of |Atmospheric
| t | |ber |Gross|tance|miles.| Fuel. |-------+-----| fuel |temperature
| i | | of |load.| run.| | | | Per | per | and
| v