This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol2", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
See Curb to Skylight.
Lead Covering to Curb is billed by weight, and kept separate. Allow 3 inches for passings and 6 inches at angles.
Copper Nailing to Ditto as previously described. The lead covering of curb may be dressed over slates at sides and front, in which case take tilting fillets to sides; or it may be dressed under the slates and over fillet as a secret gutter; or it may form a cover flashing over soakers. The modes of measurement in either case have been previously explained.
Take a back gutter as to Skylights.
This is better numbered and described in one item.
Measure per foot super., and bill by weight, and describe as in Covering to Trap.
Number. Copper Nailing. - Measure per foot run.