Measures taken at the locks & large mill, by myself May 11. 17.
the water was running 4½ I. deep over the waste.
| surface of water in canal above that in upper chamber |
8¼ I |
0–8 |
½ |
| depth of water in |
upper chamber, |
from it’s surface to it’s floor |
6 f. 6 I. |
6–6 |
|
|
middle do |
do |
|
1–4 |
|
|
|
lowest do |
do |
|
1–8 |
|
|
| clear lift of |
middle lock |
7.f. 6 I. |
|
7–6 |
|
|
Lowest do |
7 f 8 I |
deduct depth of water—leaves |
6–0 |
|
| clear width of the chambers |
8.f. |
|
20–4 |
½ |
| each recess is 9.I. |
deduct depth on waste |
4 |
½ |
| clear width at recesses |
9 f. 6 |
|
20–0 |
|
| clear length of each chamber inside 68.f. 6.I. |
f |
|
| the floor of the lowest chamber being 1.f. too high, call the whole |
21–0 |
|
| then 3. lifts of 7.f. each accomplishes it |
|
|
| Mill |
|
|
| from surface of water in the canal to bottom of forebay or top of wheel |
2 |
f 9I. |
| diam. of wheel 14.f. |
14 |
–0 |
| bottom of wheel above surface of river at the tail 2.f. |
2 |
|
|
18 |
–9 |
| deduct depth of water on the waste |
|
4½ |
| leaves height of waste above the surface of the river at the tail |
18 |
–4½ |
| height of waste above surface of river at the tail of the lock as above |
20 |
–0 |
| this diffce may be the fall in the river from tail of lock to tail of mill. |
1 |
–7½′1 |
| Stone work for locks of 3. chambers of 7.f. lift each. exclusive of foundations. |
|
|
f |
|
|
|
| 3. |
chambers of 70.f. length clear, for both sides |
420 |
|
|
|
| 38. |
abutments @ 11 f–8. I apart, 8.f. long at bottom 4.f. at top say 6.f. |
228 |
|
perch |
|
|
running measure |
648 |
= |
40. |
|
|
thickness 4.f. at bottom, 2.f. at top. say 3.f. × 40 = |
|
|
120. |
|
|
height above foundation, or floor 10 f. × 120. |
|
|
1200. |
|
| 4. |
breast walls 16.f. long. make 64.f. running measure = |
3.75 perch. |
|
|
|
|
| 4. |
f. thick |
15. |
|
|
|
|
| 7. |
f. high. say for round numbers |
|
|
100. |
|
|
|
|
|
1300. |
perch. |
|
D |
|
|
| Stone mason for laying @ .75 |
975. |
|
|
| lime & planter’s work @ 1.75 |
2275. |
) |
by myself. |
| Carpenter’s & Smith’s work & digging |
|
| Suppose the foundation of the lower lock sufficient, & the others going down to that |
| |
foundation of middle chamber 7 f below it’s floor is |
140 f = 8½ perch × 4 × 7 = |
238. |
perch. |
|
|
it’s breast 1. perch long, 4.f. thick, 7.f. to the floor |
|
28 |
|
| |
foundation of upper chamber 14.f below it’s floor is |
140 f = 8½ perch × 4 × 14 = |
476 |
|
|
|
it’s 2. breasts, 1. perch long, 4 f. thick 14.f. high is |
140 f = 8½ × 4 × 14 = |
112 |
|
|
|
854. |
|
|
D |
|
| Mason @ .75 |
640 |
|
| lime and planter’s work @ 1.75 |
1494. |
by myself |
|
2134 |
|
|
|
D |
|
|
|
|
|
|
| All together work done |
by the mason |
975 |
+ |
640. |
= |
1615 |
|
|
|
by myself |
2275 |
+ |
1494 |
= |
3769 |
) |
D |
|
|
|
|
5384 |
= 4385. |
by myself |
| suppose Carpenter’s & smith’s work & digging worth |
|
616 |
|
|
|
|
6000 |
|
|
