PART II 



LABORATORY WORK 



Directions for laboratory work for each chapter except X and 

 XII are appended. Lists of apparatus and materials needed have 

 been included as an aid to the teacher. Directions for making 

 up the necessary quantitative solutions will be found at the end 

 of the volume. 



MATERIALS 



The following materials should be available : 



1. Cleaning fluid a saturated solution of potassium bichromate in con- 

 centrated sulphuric acid. 



2. Soap solution. 



3. Sand or damp sawdust, placed for instant use to extinguish small fires. 



4. A blanket or woolen rug is a valuable aid in case a student's clothing 

 catches fire. 



5. A supply of sodium bicarbonate solution should be kept on hand for 

 use if a student gets acid in his eyes. Wash under running water and pour 

 on sodium bicarbonate solution. 



6. Boric acid solution should be kept for use if a student gets alkali in 

 his eyes. 



The following list includes the apparatus desirable for the 

 equipment of the desk of each student. It is supplemented 

 occasionally by articles obtained temporarily from the storeroom. 



4 Beakers, assorted sizes. 1 Graduate, 100 c.c. 



1 Doz. test tubes. 1 1 c.c. pipette, graduated in 1/100 



1 Erlenmeyer flask, 250 c.c. c - c - 



1 Erlenmeyer flask, 500 c.c. L ^ c ' c - pipette. 



- ' a i ITAA 1 10 c.c. pipette. 



2 Florentine flasks, 500 c*. i 2 c c. pipette. 

 1 Florentine flask, 1000 c.c. j 25 c c pip ette> 

 1 Funnel, large. 2 Watch glasses. 

 1 Funnel, small. 1 Wash bottle. 



1 Graduate, 10 c.c. 2 Kjeldahl flasks, 500 c.c. 



228 



