EXCAVATING MACHINERY USED IN LAND DRAINAGE. 39 
Cost——Table 16 gives the approximate cost of rack-and-pinion- 
swing. rotary drag-line excavators. 
TABLE 16.—Costs of rack-and-pinion-swing, rotary, drag-line excavators, 1921. 
Size of | Length . a : : Approxi- 
Raceer otucn. Kind of power. Style of mounting. Maracas 
Cu.yds Feet. 
3 30: |eOiliencines2 2 sess. i Caterpillars eee ke ees a preter eS $11, 000 
3 AOE Sea Ge eee Aa eee -| eee e CL OF eae Sapa Ie ps ee nny it Eee fa 14, 800 
ic, Sarr Ses en Walks se eae ieee c 15,700 
aceR oni sos osc oases cbesasece / Qe sso abs te sno boos se Sas ec cS SeES Ssouess oO 
14 ADS LCase fe oes = Pe ai aC Skidlastdolersas lke yey ees. sane 20, 850 
14 ADs Se oe Genesee eee Catenpuilane se 522 wee ee epee) oe ee 29, 200 
2 GO Pesce OOS ee es Se AWK @netes seas ce tee oe ee rset ee 31, 000 
2 GO| Sa GOS regs nae hoe ease Skidsandtrollers ss eaegee ee eS ee e 25, 700 
2 GON |e Bte GOr oS ee a eeaesisees Sot Caterpillars sc.2 eee ae ae 38, 300 
2h io), | aaron GOs sea Peete ae bese Sess Skidtand rollers cs ee eee 38, 300 
3 GORE sERs CO tere Pa SEE a Walkerlece 2s: GES eS ees tadEe aes 35, 500 
33 100))| Sasa Obst en alate xk ee Skidsandsrollerssssee eee eee 46, 900 
33 LOOVIE-- CON Re ee ee Beas ‘TLMICKSet cee aa ee ea ee eee ea 56, 800 
33 | 125 ese TO soe OOS ee eens on GOs ahah ee a ee ee 71, 000 
5 1 }95| Eee GOs ee ere sees faa ree esas GOSS Sas Roses ee ee eee eae 97, 500 
To equip boilers for burning oil fuel costs from $450 to $550, de- 
pending on the size of the boiler. - 
CABLE-SWING EXCAVATOR. 
A cable-swing, drag-line excavator (Pl. VII, Fig. 1), with a 1-yard 
bucket and a 40-foot boom, has been placed on the market recently. 
The machine is mounted on four apron tractors and is operated by a 
55-horse power, two-cylinder opposed-type engine. The weight is 
about 20 tons. The road speed is one-half mile per hour. The hoist- 
ing line is five-eighths inch and the loading tine three-fourths inch. 
The machine costs $7,000, including the bucket. It can be operated by 
one runner and one oiler and consumes about 35 gallons of gasoline 
in 10 hours of operation. The bucket measures 35 inches wide. The 
over-all clearance of the machine is 10 feet 3 inches by 26 feet. The 
machine has a 10-foot turntable. The vertical distance from the 
ground to the fair lead sheaves is 5 feet 2 inches, and the horizontal 
distance from the boom pivot to the center of the turntable is 6 feet 
9 inches, The machine can be shipped, assembled, on one car. Only 
the boom and A frame are dismantled for shipping. 
NONROTATING DRAG-LINE EXCAVATORS. 
A light drag-line excavator of the nonrotating type is being used 
rather extensively (Pl. VII, Fig. 2). The machine is built entirely of 
steel. The main frame is 24 by 24 feet, but can easily be made wider 
or narrower if desired. The platform is 12 by 30 feet. The frame 
is mounted on four steel wheels, each 5 feet high and 3 feet wide. 
The boom is 40 feet long and can be extended 10 feet more if it is 
desired to use the machine for tile trenching or lowering large tile 
