The six holes are first drilled and tapped for 14-inch screws in approximately the right positions. ... The diagram B which represents a. plan view, shows the bracket attached to the front side of the carriage. the microscope being used in this case ... The microscope may be adjusted for focus by first placing a rule or scale on a piece of wood at such a height that the face of the scale ... The spiders for spinning these webs are obtained in the autumn as they spin the best webs at that time.
|Title||:||Machinery: Engineering edition|