DR. MARTIN BARRY'S RESEARCHES IN EMBRYOLOGY. 



331 



118. Table of Measurements. 



The measurements are given in fractions of a Paris line ('"), the micrometer used, 

 one of Frauenhofer's, being divided according to French measure. The French 

 inch (of twelve lines) is to the English inch, as 1-06575 is to 1*00000, or nearly one 

 fifteenth more. Assuming it to be exactly one fifteenth more, the simplest mode of 

 converting the fraction of a French line into the fraction of an English 'mch, will be 

 to multiply the denominator of the former by the number 11*25 (or II5). Thus, the 

 actual length of the smallest ovisac in fig. 9. from the Dog, measuring -rfoth of a Paris 

 line, is found to be TiVr^h of an English inch. 



The compressor having been generally used in these researches, some allowance 

 must be made on this account, the actual size of the objects h and h i being rather 

 below the measurements given in the Table. 



When the object is elliptical, it is the long diameter the measurement of which is 

 given in the Table. 



t The whole object -yV'"- + The whole object -rV'"- § Tlie peculiar granules 



II Oil-like globules, some of them -j-Att'" and upwards. The peculiar granules, mean length -rfo'". 



2 u 2 



