Cycle Repairing and Adjusting
With a Chapter on building a Bicycle from a Set of Parts

78 CYCLE REPAIRING a minute in a cyanide dip will restore that. Pass the articles on to a separate scouring bench and clean well with a soft brush and rotten-stone, rinse off in clean water, and get them into the nickel solution at once. Difficulties with nickel solutions can easily be avoided by using the best materials, the right electro-motive force (6 volts), and a resistance board. A solution made up with the best double salts of nickel and ammonia, kept slightly acid with best sulphuric acid, will remain in good condition and work well if ordinary care is exercised to keep out dirt and foreign matter. A 100-gal. bath was in use for six years with less than a quarter of an hour’s attention a week, apart from cleaning rods and anodes. The work, when put in the bath a second time, should remain in it about three hours. Then finish off and polish as usual. Keep dust and dirt out of the solutions by covering them when not in use, and have-the plating shop a reason- able distance from the polishing machines for the same reason. Have as much light as possible on the vats, but keep the direct rays of the sun from them. Keep the nickel solution as near 600° F. as possible. Use the resist- ance board carefully. Nickel, to be tough and durable, must be deposited at a slow rate. As soon as the extrem- ities of the work begin to turn a dark colour, lower the current passing. In the latter stages of cleaning articles, do not touch them with the hands. Do all wiring up on the scouring bench before swilling off.