298 



Y. KOGA & O. YAMAGATA. 



and the strips which lie parallel to and equidistant from the middle 

 line have nearly the same fineness. The correspondence is not 

 strictly exact as may be seen in Table III. The small divergences 

 may be due, apart from slight irregularities occurring in the metal 

 itself, to the fact that the strips, into which the blanks were cut, were 

 not, from instrumental causes, mathematically corresponding divisions 

 of the original bar. 



In order to eliminate, as far as possible, the effect of such 

 irregularities, we have taken the mean of the several blanks as given 

 in the last column of Table II. Thus we obtain, so to speak, an ideal 

 composite blank or coin the fineness of the several paris of which is 

 represented in Fig. 5. 



Fig. 5. 



The fineness of the entire blank— 90O3. 



We also see that on an average the coins produced from a melt 

 are about 1*3 per mil higher in fineness than the assay of granulations 

 ofthat melt, as shown in the following statement : — 



