LABORATORY EQUIPMENT FOR CHEMISTRY 107


*Rectifier, chemical type
Shunts


 Resistance coils
 Wheatstone bridge
Secure Locally


Auto-electric equipment Electric bells
Dry cells Incandescent bulbs
Friction tape Induction coils, Fo
Incandescent bulbs, 110 v. Push buttons
Plugs and sockets Wire, insulated co
Transformers, small 110-6 v. No. 30
Batteries, commercial types
 Purchase from Supply House
Telephone outfit (Sears, Roe- Wire, German sil
 buck) No. 18, No. 30
Motors, "Little Hustler"
 Add, as Soon as Practicable


Binding posts and connectors
Daniel or gravity cells, with
 chemicals
*Galvanometer, D'Arsonval or
 tangent
 Knife switches, single and double
 Metallic electrode elements of
 aluminum, carbon, copper,
 iron, lead, nickel, tin, zinc
 Pole changer, or commutator
*Rectifier, Tungar bulb
Resistence spools, standard set
*Telegraph relay


, auto, 6-12v.
rd type

pper, No. 18,


ver, insulated,


*Volt-ammeter
Contact keys
*Dynamo, hand power
Induction coils, demonstration
 form
*Magneto generator
*Plunge battery
Porus cups, small
Resistance boxes, .1 to 40 ohms
*Telegraph key and sounder
*Transformer, step-down
Wireless, student's outfit


 STARTING THE SMALL CHEMISTRY LABORATORY

 For the material included in this section, the committee
wishes to acknowledge its appreciation to Dr. Hanor A. Webb
of George Peabody College for Teachers.
 Chemistry is par 'excellence the experimental science. Chem-
ical phenomena must be brought about deliberately; in but few
instances may we profitably wait for Nature to perform chem-
ical experiments. I would teach biology principally in the woods
and fields; I would instruct in physics anywhere in and around
the house, the barn, the store; but if I should offer chemistry
without a certain amount of equipment set up in an orderly
fashion, I would operate under false pretenses.