■ 1 ö 发 *— — * 
The cost of ejection can be found approximately for ordinavy conditions from 
the following table. It must not be forgotten that there is a great variation in the 
cost of erection ; for it depends upon the locality, weather, skill of laborers, efficiency 
of foreman , etc. Those who feel inclined to question the correctness of this table 
should mako some allowanac for tho difficulty which tlie author lias experienced in 
getting any data whatsoever upon the subject. 一 
Span. 
Yen. 
Span. 
Yen. 
Span. 
Yen. 
6。’ 
6o 
150 ， 
330 
2 4 ぴ 
1010 
7 。, 
70 
i6o , 
420 
w 
1100 
8o r 
no 
170 ， 
480 、 
26o f 
1*200 
90 ， 
130 
x8o f 
550 
27c/ 
I30O 
10 o' 
150 
iqo f 
610 
28o f 
1410 
110 ， 
. 170 
200 ， 
690 
•29c/ 
1520 
J20 r 
200 
770 
300' 
1650 
24O 
221 3 ， 
85 〇 
14 ぴ 
a80 
230 f 
930 
In the following table will be found approximately what it ought to cost to givo 
three good coats of paint to bridges of the different spans. 
Spjin. 
Yen. 
Span. 
Yen. 
60, 
8c/ 
40 
70 
200, 
220 f 
300 
350 
10 o' 
100 
24 O' 
410 
120 f 
125 
26cy 
470 
14 ^ 
160 
280' 
550 
160^ 
200 
3 〇 0 ^ 
600 
1 8c/ 
250 
• The data, from which this table was made, were taken from the actual cost of 
painting two Tokio bridges. The contractor’s figures were ‘20 sen per tsubo 
(86 square feet) for tlie first coat, the object, of wliieli is to prevent rust, 12 sen per 
tsubo, for the second coat, and 24 sen per tsubo for the third or finishing coat, mak- 
ing in all 5G sen per tsubo. 
To the author’s American ideas the figures of cost given in the table seem exor* 
bitanfc. At the time when the Tokio bridges referred to were painted labour was 
more expensive than it is now, and kinsatsu were cheaper, so it is more than probable 
that, if present prices were used, the figures in the table would he materially reduced. 
But as both labour and kinsatsu are always varying, this table will be as good as any 
other ; for l>y divitliug by 56 the cost there given for any particular case and 
multiplying the quotient by the proper cliargo per tsubo will bo found the probable 
cost of painting for nny number and quality of coats of paint. 
In the following table the author has endeavoured to give what he considers 
ought to bo tlie total actual cost for the single track bridgrs of this treatise. He lias 
assumed the cost of finished wrought iron at the nearest railway station or seaport to 
be six sen per pound, that of oast iron four sen per pound, lumber twelve yen per 
