Il saggiatore (The assayer) by Galileo Galilei (–) is the final and most significant work in the polemic regarding the characteristics of. This is Galileo’s argument from “The Assayer,” which I encountered in both my history survey of modern philosophy and in metaphysics. Galileo. Galileo Galilei; Il Saggiatore (The Assayer); Rome, This quietly polemical text puts the case for a pared-down scientific conception of matter and a.

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I am aware that this name Lothario Sarsi, unheard of in the world, serves as a mask for someone who wants to remain unknown. And truly that is what I hope will now take place.

Not content with haying disproved our reasoning set forth to explain the fact that the tails of comets sometimes appear to be bent in an are, he adds that nothing new was achieved by me in this, as it had all been published long ago, and then refuted, by Johann Kepler. Sarsi says he does not wish to be numbered among those who affront the sages by disbelieving and contradicting them. And since it is Guiducci’s statement that is correct, Sarsi interprets the other one by saying that if indeed motion, as motion, is not the cause of beat, nevertheless friction is not created without motion, so that at least derivatively we may say that motion is the cause.

The context of the essay was to reply to the treatise Libra astronomica ac philosophica of by Orazio Grassia Jesuit mathematician at the Collegio Romanowhich used the pseudonym of Lotario Sarsi Sigensano.

The Assayer

This book was edited and published by members of the Lynx. Your Excellency, if this thing is true, Sarsi has a clear road to the most admirable inventions ever thought of.

Always, the mere presence assaye fire-particles alone will not create heat. Kepler tried to give a reason for the tail being really curved; Guiducci supposes it to be really straight, and seeks a cause for its bent appearance.

Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer – World Digital Library

These leave some tracks in moving over the oily surface, and the reflection of fight takes place in their edges, and since they are numerous and regularly arranged this forms a light stripe. February 10, at Asaayer merely do not believe that a cold arrow shot from a bow can take fire in the air; rather, we think that ff an arrow were shot when afire, it would cool down more quickly than it would if it were held still.


In order to avoid equivocation Sarsi needed to give his classification at least three parts, and say: Fill in your details below or click an icon to log in: Sounds are made and heard by us when the airwithout any special property of “sonority” or “transonority” -is ruffled by a rapid tremor into very minute waves and moves certain cartilages of a tympanum in our ear.

It is true that because eagles are rare birds they are little seen and less heard, while birds that fly like starlings fill the sky with shrieks and cries, aseayer wherever they settle befoul the earth beneath them.

What he said was, to be exact, “If the telescope does not render stars visible by enlarging them, then by some unheard-of means it must illuminate them. We did say they are false, but so far as authority is concerned yours alone is as effective as an army’s in rendering the events true gakilei false.

Hence they must have rough surfaces, for if they were smooth as mirrors no reflection would reach us from them and they would be quite invisible to us. Guiducci was often present, and one day he told me that he had thought of speaking on comets before the Academy; if I liked, he would include what he had heard from me along with things he had gathered from other authors or had thought himself.

He did not criticize Father Grassi or anyone else who had not previously done this. Thus Sarsi may see that insensible reductions of weight do occur from consumption over a period of months on end, let alone the few minutes he may have persisted in hammering away at his bit of copper.

Well, it truly is a great advantage to have one’s bread buttered on rhe sides, thr to be able to say: Upon hearing this news I returned to Padua, where I then resided, and set myself to thinking about the problem. You will see a bright reflection of the sun on the surface of the sea near the line passing vertically through the solar disk. You take your stand galileu the authority of many poets against our experiments.


Only too clearly does Sarsi show his desire to strip me completely of any praise. I imagined that while this lasted you and Aristotle would grant me that since the air was then properly disposed for kindling the comet, it would likewise be suitable for melting lead balls and cooking eggs, inasmuch as you seem to require the same condition for both effects.

Anyone would make a serious error if he said that the hand, in addition to the properties of moving and touching, possessed another faculty of “tickling,” as if tickling were a phenomenon that resided in the hand that tickled.

The left hand supported the instrument, and the fingers of the boy were moving so that he drew from this a variety of notes, and most melodious ones too, without any blowing. Why did you not say to us at the outset, -Interpose a flame between the eye and some star, and the star will be made neither more nor less visible”?

The book was dedicated to the new pope. Waves are propagated very rapidly in this way, and high tones are produced by frequent waves and low tones by sparse ones. If, instead of filching some trifle, I had yhe nobly set myself to search out books by some reputable author not as well known in these parts, and had then tried to suppress his name and galipei all his labors to myself, perhaps Sarsi would consider such an enterprise as grand and heroic as the other seems to him cowardly and hte.

The same may be said of the tube of the throat, which, varying in length and breadth, accommodates itself to the formation of various notes and may be said to become various tubes.