We inquired as to the effect on the operatives of this animalized atmosphere, and were informed that it was not known to be injurious. On the contrary, it was stated as a singular fact, in connection with the late visitation of cholera in Aberdeen, that not a single comb-maker had been affected by the disease, at least fatally; whence it may be inferred, although we do not pretend to assign the reason, that the fabrication of horn must be attended with considerable anti-miasmatic effects. At all events it is certain that horn-dust cannot exercise that injurious action on the air-passages and the lungs which is experienced in many trades, such as that of the steel-grinders of Sheffield.
Passing over one or two intermediate stages after the combs are thus cut and twinned--such as "thinning" on the outer edge by means of grindstones, and "pointing," by means of peculiarly-shaped bevel-saws--we arrive at the next department, where the finishing is given by the hand. Here we meet with artificers who, with a pertinacious reverence for ancient usages, preserve among themselves the appellation of comb-makers _par excellence_, forgetting that the very boys and girls in their respective departments play as important a part in the aggregate production. And yet, in their province, they are deserving of commendation. The specimens of elaborate and skilful decoration displayed here, especially on ladies' braid-combs, were admirable, and one pattern was shown us wherein there was a species of chain, formed of beautifully stained horn, woven with the head of the comb, which, although we examined it minutely, and knew there must have been a joint in each alternate link, we nevertheless failed to discover. It is in this department that the teeth are smoothed and rounded--an operation technically termed "grailling"--which is effected by different sorts of cutting rasps. So far as the making or formation is concerned, the combs are now finished.
At the opposite side of the buildings we were taken to the department where the staining is carried on. This will be better understood if described as the imitation on the various classes of combs of the natural diversity of tint in tortoise-shell. The horn, whether in plates, as in the side-combs, or after being "twinned," as in dressing-combs, is immersed in diluted nitric acid, which, with its characteristic action on all organized tissues, creates a deep and permanent yellow stain. This resembles the ground color of tortoise-shell; and to produce the variegation, the horns are then treated with a particular composition of red oxide of lead, with certain alkaline compounds, which has the effect of neutralizing the action of the acid, and imprinting a stain of a deep orange color. After being carefully washed, dried, and polished, the surface of the combs presents the beautiful and natural appearance desired. Indeed, the imitation is so perfect in the best classes of stained combs, that a practised observer can only detect it. We were shown, for example, two specimens of braid-combs, one of real tortoise-shell and another of stained horn; and so much alike were they in color and configuration, that we could not tell which was which, and yet the one comb was worth about ten times as much as the other. This operation of staining, which is somewhat artistic, is performed by women.