We would, however, mention a few particulars connected with the process for the information of those who have not hitherto practised the Dry Collodion process, as detailed by Mr. Long.
The plates as prepared for sale, are hermetically sealed in an envelope perfectly impervious to air and moisture, they can therefore be exported to any climate without risk of deterioration.
Plates prepared by Mr. Long's process will keep sensitive for almost an indefinite period, and can be developed at any time without regard to the date of exposure; this, it will be seen, is of immense advantage to the tourist, as he can delay the development of the whole of his plates until his return.
To those Photographers whose inclinations or want of leisure will not admit of their carrying through the first preparation of the plate, these Dry Sensitive Plates will be found invaluable, enabling their whole energy to be directed to the more careful selection of subject.
The plates being dry, there is no danger of dust settling on their surfaces; this point will be appreciated by every Photographer.
The development of the pictures can be conducted in any room whence the light can be excluded—as the process is simple and clean—three dishes being the only requisites in point of apparatus.
To Officers, Engineers, and Architects, these Dry Plates offer a desideratum of no small value, as they are always ready for use, occupy very little room in travelling, and can be used under circumstances which would preclude the adoption of any process that had to be carried out on the spot.
BLAND & LONG,