52 BOOK FLOOR OF GREATER NEW YORK. 
Summary of records of borings made in New York and vicimty-Contmned 
2. BORINGS IN THE BOROUGH OF MANHATTAN-Continued. 
[BULL.27C 
Serial 
num 
ber. 
Depth of boring to rock. 
Location. 
As given. 
Referred 
to U. S. 
datum, 
Sandy 
Hook. 
540 
541 
542 
543 
544 
545 
546 
546a 
5466 
546c 
546(7 
Foundations of taUbuUdings— Cont'd. 
Johnston building, southwest 
corner Broad street and Ex- 
change place." 
Empire building, 71 Broadway, 
near Rector street.'' 
Gillender building, northwest 
corner Walland Nassau streets, c 
NewYorkStock Exchange, Broad 
and New streets. d 
Stok.- building, Williams and 
Cedar streets." 
Mutual Life building, Nassau. 
1 Lberty, and Cedar streets./ 
Broadway — 
Washington Life building, be- 
tween Cedar and Liberty 
streets. 6 
Southwest corner W alker 
street. 
Plot -176 (near Grand and 
Broome streets). 
Southeast corner 20th street. .. . 
Lot438 West 39th street (south 
aide, between Ninth and 
Tenth avenues). 
35 
54 
60 
48 
-100 
- 75 
39 
39 
-19 
1!) 
45 
Kind of rock, if know! 
29 
-22 
-63 
-40 
L9 
546< 
547 
54 S 
549 
550 
Park 
Bowery, northwest corner 
Spring street. 
Park Row building/ L3 
row. ' 
American Tract Society building, 
Nassau and Spruce streets.* 
Morse building, Nassau and 
Beekman streets. J 
33to-22 
15to-19 
- 39 
86 
-100 
21 to 10 
- 35.5 
45 
47 
Rock. 
No rock. 
Rock. 
Do. 
Do. 
Do. 
No rock. 
Do. 
Rock or howlde 
Do. 
No rock. 
Rock or bowldi 
No rock. 
6.5 
-U 
Do. 
Rock. 
Standard building, Broadway 
and New street. A; 
a Engineering Record, vol. 32. 1895. p. 117. 
bGrataeap, L. P., Geol. City of New York, pp. 10-12. M . 
o Engineering Record, vol. 35, 1897. p 140 Rock, V™uurtto JgJb Rock and hardpa 
dldem, vol. 44, 1901, p. 289. Average depth below new street ( nro. kou 
ddem, vol. 34, L896, p. 184. Hock, presumably gneiss. 
/Idem, vol.45. 1902. p. 368. (Maximum.) .....x 70*707 Broadway. 
y Records 546a-^546< furnished by Mr. Robert Maynicke, architect, 726-727 Broaaway. 
ft Robertson & Potter, architects, 160 Fifth avenue. 
''Engineering Record, vol. 38, 1898, p. L66. 
fcldeS; vol! 34i 18%; £uro-108. Average depth: rock presumably gneiss. 
