In paper making, there has seldom, perhaps, arisen a greater difficulty than in furnishing a supply suited to the purposes of photography. Unquestionably, great care is requisite in the selection of the materials, their preparation, and subsequent manufacture. But the difficulty is owing more to the want of positive information on the part of the photographer, than to failure in the exertions of the Paper Maker. I have recently been informed by a gentleman who has devoted much time and attention to this particular class of paper, that after forwarding specimens to many score members of that profession, and inviting observations and suggestions thereon, not one in ten favoured him with any reply, and of those who did, although many first-rate names might be mentioned, the conclusions to which they severally came were totally adverse. It is not my intention to wander further into the field of paper and paper making than to mark the boundary which has been set up by Act of Parliament, in the form of Excise Regulations, with a few general observations upon the varieties and peculiarities of manufactured paper, as a becoming and at the present time somewhat important termination to our subject. Manufactured paper, independently of the miscellaneous kinds, such as blotting, filtering, and the like, which are rendered absorbent by the free use of _woollen_ rags, may be divided into three distinct classes, _viz._, writing, printing, and wrapping. The former again into _five_, cream wove (8), yellow wove (17), blue wove (7), cream laid (16), and blue laid (5). The printing into _two_, laid and wove, and the latter into _four_, blue (22), purple (24), brown (25), and whited brown (23), as it is commonly termed. Each of these sorts ought again to be classified, until it would appear as if not merely all the wants, wishes, and fancies of mankind had been fully studied and provided for, but that even the utmost bounds of variety in like manner had been included, in order to test the comprehensiveness of human caprice.