16 
G. u. iiowe’s potato manual 
A VALUABLE INVENTION. 
The Boice Permutation Door Lock. 
A COMBINATION Door Lock for the frontdoors of Residences. Churches, 
Stores, Banks, Offices, Schools, etc. Any child can operate it. SAFE, SECURE, 
RELIABLE. No key nor keyhole; cannot be picked; is locked front outside by 
pressing in a button and simply shutting the door; can be unlocked with gloved 
hand and in less time than any key lock. A perfect anti-friction lock. Any 
common spindle with 3 4 inch shank knob can be used. Knobs and spindles 
furnished to all desiring them, at reasonable prices. No breakage by slamming. 
No wearing of the parts. The combination can be changed as often as desired. 
Full directions accompany each lock. 
A PERFECT SPRING CATCH, 
A PERFECT NIGHT LOCK, 
A PERFECT DEAD LOCK, 
and THE MOST PERFECT LOCK MADE. 
This lock has been patented only about a year and is just being introduced 
As yet the manufacturers are making only one size and that a large brass lock for 
heavy doors, but intend soon to have a large variety of styles that will adapt this 
principle to almost every use a lock can be put to. 
See pages 18 and 20 for further details. 
