78 79
80 81
82 83
84 85 Pg. 85, Manhole, Drawing, section of drain
86 87
88 89 Pg. 89, 5-6 Built drain; manhole 6, Drawing, 5-6 Built drain
90 91 Pg. 91, 5-7 Built drain, Drawing, Section
92 93 Pg. 93, depth of manhole, Drawing, Construction of 9-11