18 JUNIOR GRADE SCIENCE 



iii. Fluid measure. Obtain a half -pint graduated glass measure, such as 



FIG. 16. Glasses graduated for British fluid measure. 



is used by photographers ; obtain also a smaller one (Fig. 16). Examine 

 the divisions upon them : they represent fluid ounces, or parts of a fluid 



ounce, in Apothecaries' 



u\ 



BURETTE 



FIG. 17. Graduated measuring vessels. 



measure. 



iv. Graduated measur- 

 ing jar. (a) Obtain a jar 

 graduated into cubic centi- 

 metres, like that in Fig. 17. 

 Notice the graduations on 

 it, and the method of read- 

 ing them. When supplied 

 with a piece of graduated 

 apparatus, an examination 

 of it should always be made 

 so as to understand the 

 principle on which it has 

 been marked. 



v. Relation between 

 British and metric meas- 

 ures of capacity. (a) Use 

 graduated jars to deter- 

 mine : (1) The number of 

 cub. cms. in 1 fluid ounce ; 

 (2) the number of ounces 

 and drachms in 100 cub. 

 cms. ; (3) the number of 

 ounces and drachms in 

 1000 cub. cms. 



(6) FiO a measure up to 

 the half-pint mark with 

 water. Pour the water 

 into the metric graduated 



