4 THE FROG 
2. Criticisms of notes are not to be erased. Criticisms of 
drawings made on the drawings themselves may be erased. 
Criticisms may take the form of a reference to a section and 
paragraph of these directions. . 
3. Unsatisfactory work must be revised. Corrections of notes 
may be made on the same sheet, if there is room, or on additional 
sheets inserted for the purpose. 
4. After corrections are made the work is all to be filed in the 
covers. At the close of the course the entire notebook is to be 
handed in for final inspection. 
II. InprvipvAL EouipMENT FURNISHED BY THE LABORATORY. 
The student should check up the following equipment and 
report promptly any deficiencies that may occur at any time. 
Compound microscope. Use the microscope whose number corresponds to 
the number of your place at the table. 
Dissecting stand; dissecting lens; metallic plate, white on one side, black 
on the other. 
Instrument box containing the following: Large scissors, small scissors, 
large forceps, small forceps, scalpel, seeker, probe, blowpipe, two dissecting 
needles mounted in handles, bristle with waxed tip. 
Pipette (medicine dropper) with black bulb. This is to be used for washing 
out delicate dissections. The pipettes with white bulbs which may be found 
about the laboratory are for use with living material and should be carefully 
guarded from contact with poisons. 
Emery paper (to be used for sharpening pencils) mounted on a wooden block. 
Millimeter rule. 
Booklet on the use and care of the microscope. 
Lens paper. To avoid dust, this should be kept between the leaves of the 
booklet. When you need more, call for it at the supply table. 
Absorbent paper. When you need more, call for it at the supply table. 
Microscopical object slides and cover slips should not be kept 
in the lockers. They may be obtained from the supply table, to 
which they should be returned after use. 
III. GENERAL DIRECTIONS FOR DISSECTING. 
1. Keep all necessary instruments on the table before you 
where they can be found without loss of time. 
2. If the specimen is being preserved in formalin always wash 
it thoroughly under the tap before beginning work. 
3. The specimen should ordinarily be kept in a dissecting tray 
