Mar 17, Richard Jespers rated it it was amazing Do you recall how the world seemed to you, at times, when you were twelve?
The constant activity which you Venetians display in your famous arsenal suggests to the studious mind a large field for investigation, especially that part of the work which involves mechanics; for in this department all types of instruments and machines are constantly being constructed by many artisans, among whom there must be some who, partly by inherited experience and partly by their own observations, have become highly expert and clever in explanation.
You are quite right. At times also I have been put to confusion and driven to despair of ever explaining something for which I could not account, but which my senses told me to be true.
And notwithstanding the fact that what the old man told us a little while ago is proverbial and commonly accepted, yet it seemed to me altogether false, like many another saying which is current among the ignorant; for I think they introduce these expressions in order to give the appearance of knowing something about matters which they do not understand.
You refer, perhaps, to that last remark of his when we asked the reason why they employed stocks, scaffolding and bracing of larger dimensions for launching a big vessel than they do for a small one; and he answered that they did this in order to avoid the danger of the ship parting under its own heavy weight [vasta mole], a danger to which small boats are not subject?
Yes, that is what I mean; and I refer especially to his last assertion which I have always regarded as a false, though current, opinion; namely, that in speaking of these and other similar machines one cannot argue from the small to the large, because many devices which succeed on a small scale do not work on a large scale.
Now, since mechanics has its foundation in geometry, where mere size cuts no figure, I do not see that the properties of circles, triangles, cylinders, cones and other solid figures will change with their size.
If, therefore, a large machine be constructed in such a way that its parts bear to one another the same ratio as in a smaller one, and if the smaller is sufficiently strong for the purpose for which it was designed, I do not see why the larger also should not be able to withstand any severe and destructive tests to which it may be subjected.
The common opinion is here absolutely wrong.
Indeed, it is so far wrong that precisely the opposite is true, namely, that many machines can be constructed even more perfectly on a large scale than on a small; thus, for instance, a clock which indicates and strikes the hour can be made more accurate on a large scale than on a small.
There are some intelligent people who maintain this same opinion, but on more reasonable grounds, when they cut loose from geometry and argue that the better performance of the large machine is owing to the imperfections and variations of the material.
Here I trust you will not chargeEdition: Yet I shall say it and will affirm that, even if the imperfections Edition: Since I assume matter to be unchangeable and always the same, it is clear that we are no less able to treat this constant and invariable property in a rigid manner than if it belonged to simple and pure mathematics.
Therefore, Sagredo, you would do well to change the opinion which you, and perhaps also many other students of mechanics, have entertained concerning the ability of machines and structures to resist external disturbances, thinking that when they are built of the same material and maintain the same ratio between parts, they are able equally, or rather proportionally, to resist or yield to such external disturbances and blows.
For we can demonstrate by geometry that the large machine is not proportionately stronger than the small.
Finally, we may say that, for every machine and structure, whether artificial or natural, there is set a necessary limit beyond which neither art nor nature can pass; it is here understood, of course, that the material is the same and the proportion preserved. My brain already reels.
My mind, like a cloud momentarily illuminated by a lightning-flash, is for an instant filled with an unusual light, which now beckons to me and which now suddenly mingles and obscures strange, crude ideas. From what you have said it appears to me impossible to build two similar structures of the same material, but of different sizes and have them proportionately strong; and if this were so, it wouldEdition: So it is, Sagredo.
And to make sure that we understand each other, I say that if we take a wooden rod of a certain length and size, fitted, say, into a wall at right angles, i. And this which I have said about the ability to support itself must be understood to apply also to other tests; so that if a piece of scantling [corrente] will carry the weight of ten similar to itself, a beam [trave] having the same proportions will not be able to support ten similar beams.
Please observe, gentlemen, how facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty.
Who does not know that a horse falling from a height of three or four cubits will break his bones, while a dog falling from the same height or a cat from a height of eight or ten cubits will suffer no injury? Equally harmless would be the fall of a grasshopper from a tower or the fall of an ant from the distance of the moon.
Do not children fall with impunity from heights which would cost their elders a broken leg or perhaps a fractured skull?
And just as smaller animals are proportionately stronger and more robust than the larger, so also smaller plants are able to stand up better than larger.2nd ghost: Actually, I was accidentally locked in the refrigerator. Initially, I was shivering, then my whole body started to freeze, later I felt the whole world was dark and I died suffocating.
1st ghost: Wow what a horrible way to die. 2nd ghost: How about you?
How u die? 1st ghost: I died from heart attack.
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Writing: Characters and Dialogue Parent Category: Fiction Writing Characters are one of the most important elements in a story, and dialogue is an effective way of conveying character. (1).which statement best describes the climax of the play? A: The crowd is moved by Brutus's and Antony's speeches.
Brutus is terrified of seeing Caesar's ghost again at Sardis. D: Brutus plans on betraying Cassius when they arrive at Philippi. Write a conversation between two friends about healthy food Answer English; 5 points 4 hours.
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The Editor's Blog is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to ashio-midori.com Yet dialogue is a writing element different from other text, Two of the elements of the dialogue “No” and “Go on.