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J. Amadio, Optician,

TESTIMONIALS.

Clerical Journal; July 22nd, 1857.—Both for private study, and for the now common task of lecturing in towns and villages, the clergy are likely to take an interest in this catalogue, which they may procure by writing for it. It contains engravings of nine microscopes, from thirty pounds to half-a-guinea, all of which are as cheap as they can well he produced with the recent improvements, We have used two of them; that marked No, 6, described as a Compound Microscope, with forceps, condenser, animalculse cage and one set of achromatics, the whole packed in a mahogany case, price five pounds five shillings ; and No. 11, a Compound Microscope, with pincers, condenser, two slides, two glass plates, and three object glasses, the whole packed in a mahogany case, price eighteen shillings and sixpence. The former is a very complete affair for the money with the highest power J inch, magnifying 350 diameters, and the lowest one inch, eighty diameters. This instrument will answer every purpose when high professional accuracy is not needed. The cheaper microscope is very powerful, showing the animalculse in water plainly, and being very portable will be found a useful companion on excursions for natural history purposes. Photography is now applicable to the microscope, in illustration of which we may mention a very beautiful object prepared by Mr. Amadio, the “Lord’s Prayer.” the whole space of which in scarcely visable to the naked eye, and yet by the low power of No. 6, microscope every letter appears in a good text-hand. We have much pleesure in introducing these finished instruments to our readers.

Household Words, August 8th, 1857.—A microscope museum should be formed on somewhat the same principle as a picture gallery. First there should be nothing but what is good; secondly, there should be variety, with several samples of all the great masters. Preparers who have been in the habit of collecting during several years, have each of them, probably, in his secret store-house, some treasure whose native habitat, or source has baffled the research of competing collectors. To some the superiority of certain instruments, or special adroitness, may give the superiority in certain classes of objects. The microscopist will profit by all these in turn. The field of nature is so vast, that every student may gratify his own peculiar taste. It is desirable to have some sequence and connexion in the objects collected* Thus, we may have preparations of the principle organs of the domestic fly, to illustrate its economy; the eye, the proboscis, the foot, the spiracle, and other parts of its bodily frame. The scales of butterflies and other insects afford ample subjects for comparison; the cuticles of plants, showing their stomata, or perspiring holes; sections of bones and teeth; starches from various plants; feathers, hairs, and innumerable other things will suggest themselves. A good selection of the spiracles, or breathing-holes in the sides of different larvse and insects would afford a series of objects to which there is nothing similer in birds and beasts. A friend to whom I showed the spiracle of the house-fly, exclaimed in astonishment that nature had taken more pains with those insignificant creatures than with us.

One great merit of the modern microscopes is their portability; if the reader wish to test their attractiveness, let him arrive some rainy day at a country house full of company, when the guests are prevented from enjoying out-door amusements. Let him there produce one of Amadio’s forty-guinea instruments, with the polarizing and dark-ground apparatus complete accompanied by a box-full of good preparations, and he will work wonders.

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