We will now proceed to consider the acoustical properties of the Violin. These are, in every particular, surprisingly great, and are the results of many tests, the chief of which has been the adoption of several varieties of wood in its construction. In Brescia, which was in all probability the cradle of Violin manufacture, the selection of the material of the sides and back from the pear, lemon,
and ash trees was very general, and there is every reason to believe that Brescia was the first place where such woods were used. It is possible that the makers who chose them for the sides and backs of their instruments considered it desirable to have material more akin to that adopted for the bellies, which was the finest description of pine, and that the result was found to be a tone of great mellowness. If they used these woods with this intention, their calculations were undoubtedly correct. They appear to have worked these woods with but few exceptions for their Tenors, Violoncellos, and Double Basses, while they adopted the harder woods for their Violins, all which facts tend to show that these rare old makers did not consider soft wood eligible for the back and sides of
the leading instrument; and later experiment has shown them to have arrived at a correct conclusion on this point. The experiments necessary to obtain these results have been effected by cutting woods of several kinds and qualities into various sizes, so as to give the sounds of the diatonic scale. By comparing the intensity and quality of tone produced by each sample of wood, plane-tree2 and sycamore have been found to surpass the rest. The Cremonese makers seem to have adhered chiefly to the use of maple, varying the manner of cutting it. First, they made the back in one piece, technically known as a "whole back"; secondly, the back in two parts; thirdly, the cutting known as the "slab back." There being considerable doubt as to the mode of dividing the timber, the woodcuts given will assist the reader to understand it. Fig. 1 represents the cutting for the back in two pieces--the piece which is separated from the log is divided. Fig. 2 shows the method adopted to obtain the slab form.
FIG. 1. FIG. 2.
2 The Germans call the plane-tree morgenlandischer ahorn--i.e., "oriental maple." From the German word ahorn is probably derived the term "air wood," often corrupted into "hair-wood." Thomas Mace says, respecting the lute, "the air-wood is absolutely the best, and next to that our English maple."--Engel ("Researches into the Early History of the Violin Family").
JACOBUS STAINER. Date 1669.
GIUSEPPE GUARNERI DEL GESU. (THE "VIEUXTEMPS.")
NICCOLO AMATI.
19
Grand Pattern. Date 1641. (J. S. COOKE, ESQ.)
Plate II.
This mode of cutting is constantly met with in the works of the Brescian makers, and likewise in those of the early Cremonese. Andrea Amati invariably adopted this form. Stradivari rarely cut his wood slab-form. Joseph Guarneri made a few Violins of his best epoch with this cutting, the varnish on which is of an exquisite orange colour, so transparent that the curls of the wood beneath resemble richly illuminated clouds.
There can be no doubt whatever that the Cremonese and Brescian makers were exceedingly choice in the selection of their material, and their discrimination in this particular does not appear to have risen so much from a regard to the beauty as to the acoustic properties of the wood, to which they very properly gave the first place in their consideration. We have evidence of much weight upon this interesting question in the frequent piecings found on the works of Cremona makers, pointing to a seeming preference on their part to retain a piece of wood of known acoustic properties rather than to work in a larger or better preserved portion at the probable expense of tone. The time and care required for such a delicate operation must have been sufficient to have enabled the maker, had he been so minded, to have made a complete instrument. There is also ample proof that Joseph Guarneri possessed wood to the exceptional qualities of which he was fully alive, and the same may be said of Stradivari, Ruggeri, and others. It is scarcely reasonable to suppose that in the seventeenth century there was a dearth in Italy of timber suitable for the manufacture of Violins, and that in consequence these eminent makers were compelled to patch and join their material to suit their purpose. They were men who were
in the enjoyment of a patronage certainly sufficient to enable them to follow their calling without privation of any kind. Scarcity of pine and sycamore, good or bad, could not have been the cause, since we find Italian cabinet-work of great beauty that was manufactured at this same period. The plane-tree and pine used by the Amati, Stradivari, and the chief masters in Italy, was usually of foreign growth, and was taken from the Tyrol and Istria. Its value was, therefore, in advance of Italian wood, but hardly so much as to place
it beyond the reach of the Cremonese masters. It is, further, improbable that these masters of the art should have expended such marvellous care and toil over their work, pieced as it frequently was like mosaic, when for a trifling sum they could have avoided such a task to their ingenuity by purchasing fresh wood. We are therefore forced to admit that there must have been some cause of great weight which induced them to apply so much time and labour, and that the problem can only be accounted for by the solution be-fore proposed, viz., that external appearance was of less importance than the possession of acoustic properties thoroughly adapted
to the old makers' purpose, and that the scarcity of suitable wood was such as to make them hoard and make use of every particle. The selection of material was hence considered to be of prime importance by these makers; and by careful study they brought it
to a state of great perfection. The knowledge they gained of this vital branch of their art is enveloped in a similar obscurity to that which conceals their famous varnish, and in these branches of Violin manufacture rests the secret of the Italian success, and until it is rediscovered the Cremonese will remain unequalled in the manufacture of Violins.
We may now pass to the consideration of the various constituent parts of a Violin. It will be found, if a Violin be taken to pieces, that it is constructed of no less than fifty-eight separate parts, an astonishing number of factors for so small and simple-looking an instrument. The back is made of maple or sycamore, in one or two parts; the belly of the finest quality of Swiss pine, and from a piece usually divided; the sides, like the back, of maple, in six pieces, bent to the required form by means of a heated iron; the linings, which are used to secure the back and belly to the sides, are twelve in number, sometimes made of lime-tree, but also of pine. The bass or sound-bar is of pine, placed under the left foot of the bridge in a slightly oblique position, in order to facilitate the vibrating by giving about the same position as the line of the strings. The divergence is usually one-twelfth of an inch, throughout its entire length of ten inches. It is curious to discover that this system of placing the bar was adopted by Brensius of Bologna, a Viol-maker
of the fifteenth century, and by Gasparo da Salo. The later Violin-makers, however, for the most part, do not appear to have followed the example, they having placed it in a straight line, thus leaving the system to be rediscovered. The bar of the Violin not only serves the purpose of strengthening the instrument in that part where the pressure of the bridge is greatest, but forms a portion of the structure at once curious and deeply interesting; it may indeed be called the nervous system of the Violin, so exquisitely sensi-
tive is it to external touch. The slightest alteration in its position will effect such changes in the tone as often to make a good Violin worthless. Those troublesome notes technically known as "wolf notes" by its delicate adjustment are sometimes removed, or passed to intervals where the disagreeable sound is felt with less intensity. Numerous attempts have been made to reduce these features to a philosophy, but the realisation of the coveted discovery appears as distant as ever. The most minute variation in the construction of the instrument necessitates a different treatment of this active agent as regards its conjunction with the bridge; and when it is considered that scarcely two Violins can be found of exactly identical structure, it must be admitted that the difficulties in the way of laying down any set of hard and fast rules