312 BULLETIN OF THE BUREAU OF FISHERIES. 
(7) The use of a fluoroscope in connection with any form of device shown 
in the drawings or covered by the preceding claims. 
In addition to having to devise a special method, of which the above is a 
description, it was necessary to adopt radiographic apparatus and materials 
of such a nature as to make the methods and costs of the process commercial. 
For instance, it was necessary to be able to make X ray exposures over a large 
area in order to include sufficient oysters at an exposure, an area larger than 
had been before attempted or rather required in the field of surgery, in which 
I found the use of the X ray exclusive when I commenced my investigations; 
also photographic material of a nature and cost suitable for the work had to be 
sought. Without going into details, I may say that I overcame the various 
difficulties, as I believe the accompanying exhibits prove.” 
PRACTICAL DEMONSTRATION OF THE PROCESS, 
After considerable correspondence, I went to Ceylon to start my enter- 
prise, and established my equipment on the island of Ipantivu, in the north- 
western Province of Ceylon, and near to the famous pearl fishery of the Gulf 
of Manaar. I have there invested in buildings, machinery, boats, equipment, 
and photographic supplies the sum of nearly $50,000, some of it my own money, 
but most of it subscribed by different people in smaller or larger amounts, to 
whom I or my friends had explained my ideas and the possibilities therefrom. 
I proposed to get oysters when they were freshly fished, and instead of indis- 
criminately killing all in order to get the pearls of value contained in the few, 
to subject the oysters to the process. Those found to contain pearls of value 
could be immediately opened; those containing small pearls of but little or no 
value, could be planted under suitable conditions to remain until they had 
become older and larger, and the contained seed pearls also larger and of value; 
while those found to contain no pearls could be returned to the sea either in 
@ The following exhibits were appended to the manuscript submitted by the author: 
Exhibit A, showing a part of the installation on Ipantivu Island—the water distilling building and 
chimney, the process building, and bungalow. 
Exhibit B, showing a panoramic view of the installation. 
Exhibit C, showing coolies arranging oysters in trays. 
Exhibit D, showing coolies carrying trays of oysters up to the process building to be subjected 
to the X ray. 
Exhibit E, a small radiograph of some growing oysters containing pearls. 
Exhibit F, a small string of seed pearls. 
Exhibit G, a radiograph of an oyster containing a seed pearl of a larger size and a string of pearls 
of which Exhibit F was a part. Note the line down the center of the pearls showing the drilling. 
Undrilled, in their natural state, these pearls would show up even more clearly. 
Exhibit H, a part of a full-size radiograph showing some oysters containing small seed pearls. 
Exhibit I, a full-size but only partly “fixed” radiograph of 120 oysters, showing number of tray 
made by lead number thereon, and arrangement of oysters in regular rows by means of which the 
oysters held on the trays are identified. The marks made by the inspector for seed pearls, large pearls, 
or obscurity, or for other things are also shown. 
