第39章

The camera or reflecting apparatus, invented by Mr. Wolcott, was, from the nature of the case, better adapted at that day to the taking of portraits from life, than any other instruments.

After carefully examining the camera described by Daguerre, and the time stated as necessary to produce action for an image, it became evident to the mind of Mr. Wolcott at once, that more light could be obtained (as the field of view required was not large)by employing a reflector of short focus and wide aperture, than from a lens arrangement, owing to spherical aberration and other causes.

Many experiments having been tried with the small instrument figured (p. 199), a reflector for taking portraits from life was determined on, having eight inches diameter, with twelve inches focal distance for parallel rays; this was to admit plates of two inches wide by two and a half long Mr. Wolcott having on hand reflectors of the right diameter, for Newtonian telescopes, of eight feet focal distance, resolved (as it was a matter of experiment)to grind down or increase the curve for the focal distance before named--this required time. In the mean time, many plans were pursued for making good plates, and the means of finishing, them. As the completion of the large reflector drew to a close, our mutual friend, Henry Fitz, Jr., returned from England, whither he had been on a visit, and when he heard what we were about, kindly offered his assistance;he being well versed in optics, and having been before engaged with Mr. Wolcott, in that and other business is offer was gladly accepted--Mr. Wolcott himself having frequent engagement; to fill as operator in the details of mechanical dentistry. Thus, by the aid of Mr. Fitz, the reflector was polished, and experiments soon after tried on plates of two by tow and a half inches, with tolerable success.

Illness on my part quite suspended further trial for nearly four weeks.

On my recovery, early in January, 1840, our experiments were again resumed with improved results, so much so as to induce Mr. Wolcott and myself to entertain serious thoughts of making a business of the taking of likenesses from life, intending to use the reflecting apparatus invented by Mr. Wolcott, and for which he obtained Letters Patent, on the 8th day of May, 1840.

Up to January 1st, 1840, all experiments had been tried on an economical scale, and the apparatus then made, was unfit for public exhibition; we resolved to make the instruments as perfect as possible while they were in progress of manufacture.

Experiments were made upon mediums for protecting the eyes from the direct light of the sun, and also upon the best form and material for a back-ground to the likenesses. The length of time required for a "sitting," even with the reflecting apparatus, was such as to render the operation anything but pleasant.

Expedients were ever ready in the hands of Wolcott: blue glass was tried and abandoned in consequence of being, at that time, unable to procure a piece of uniform density and surface:

afterwards a series of thin muslin screens secured to wire frames were prepared as a substitute for blue glass.

The objections to these screens, however, were serious, inasmuch as a multiplication of them became necessary to lessen the intensity of the light sufficiently for due protection to the eyes, without which, the likenesses, other than profiles, were very unpleasant to look upon. Most of the portraits, then of necessity were profiles formed upon back-grounds, the lighter parts relieved upon black, and the darker parts upon light ground; the back-ground proper being of light colored material with black velvet so disposed upon the light ground, this being placed sufficiently far from the sitter, to produce harmony of effect when viewed in the field of the camera.

Other difficulties presented themselves seriously to the working of the discovery of Daguerre, to portrait taking--one of which was the necessity for a constant and nearly horizontal light, that the shaded portions of the portrait should not be too hard, and yet, at the same time, be sufficiently well developed without the "high light"of the picture becoming overdone, solarized or destroyed.

In almost all the early specimens of the Daguerreotype, extremes of light and shade presented themselves, much to the annoyance of the early operators, and seriously objectionable were such portraits. To overcome this difficulty, Mr. Wolcott mounted, with suitable joints, upon the top of his camera, a large looking-glass or plane reflector, in such a manner that the light of the sun (as a strong light was absolutely necessary), when falling upon the glass could be directed upon the person in an almost horizontal direction.

Early in February, 1840, Mr. Johnson, Sen., (since deceased) sailed for Europe with a few specimen likenesses taken with the instruments completed as above, with the intention of patenting the invention.

On his arrival a joint arrangement was effected with Mr. Richard Beard, of London, in patenting and working the invention in England.

Up to February, 1840, but few friends had been made acquainted with the progress of the art in the hands of Mr. Wolcott and myself.

From time to time reports reached us from various sources of the success of others, and specimens of landscapes, etc., were exhibited at Dr. James R. Chilton's laboratory, in Broadway, much to the gratification of the numerous visitors and anxious expectants for this most wonderful discovery.

Dr. Chilton, Professor J. J. Mapes, Professor J. W. Draper.

Professor S. F. B. Morse, all of this city; Mr. Cornelius, Dr. Goddard and others of Philadelphia; Mr. Southworth, Professor Plumbe, and numerous others were early in the field;all, however, using the same description of camera as that of Daguerre, with modification for light, either by enlargement by lens and aperture for light, or by shortening the focal distance.