Making and Knowing
A minimal edition of BnF Ms Fr 640

[TOC] | [diplomatic]

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Modelling with wax

When wax is too hard, one mixes in turpentine or a little butter, which sont pl renders the wax more amiable, and more appropriate than the tallow that the Italians put in, because one has to, often, put the tools in the mouth, which are better in box wood or bone of hart.

Wax for molding —

As the wax is melted, they have sulphur that is melted, in a spoon or crucible, & they pour some in the melted wax. And the sulphur going to the bottom or remaining on top, it leaves & mixes only its substance amongst the wax, & renders it more meltable when warming it, such that having molded, it melts in the mold gently, like butter, without leaving any gently melts in the mold like butter, without leaving any pustule or bubble in it. Also be warned to not give it too much fire.

at left top margin

If

Molding wax

So that your mold grips, without repelling in any place, on a shape or image of wax, one needs to smear it with oil and moisten you sand with lukewarm water, for the cold water would furthermore repel the oil & would not make a good layer on it.

at left middle margin

Smear well, very lightly, with oil, so little that it hardly appears. Then rub with some eau de vye. Next, moisten your sand with lukewarm water so that it does not repel the oil.

Bellows of the forge

It is best that they be fixed in on some piece of membreure, through the portevent, q for they are more secure, next you can lightly secure them from above. It is necessary that the tuelle be 4 fingers on the sole of the forge.

Snakes for molding

When you take them for molding, if it is possible, do not remove their teeth if you want to keep them. For, having had their teeth removed, they get sore gums & mouth, & can no longer eat. You can keep them in a barrel full of bran or even better of earth, in a cool place, or in a glass bottle. And give them some live frog or other live animal for they eat nothing dead. Also I have noticed that

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