# Secrets of Wise Men, Chemists and Great Physicians

Author: David, Wm. K. (William King)

Genre: Category: Science - Chemistry/Biochemistry

Language: English

License: Public domain

Source: https://www.gutenberg.org/ebooks/46711

Amazon editions: https://www.amazon.com/s?k=Secrets+of+Wise+Men%2C+Chemists+and+Great+Physicians+David&tag=cyberlibrar00-20

## Summary

By this process a letter, postal card, drawing, or other manuscript can be duplicated from sixty to one hundred times from one original. Reproductions from the copying pad are now admitted in the mails as third-class matter, i. e., one cent for every two ounces or fraction thereof. A soft, gelatinous composition, similar to that used in making printers’ rollers, is made and poured into shallow pans of the required size. The pans should be made of stout zinc one-half inch deep on the inside, with a lid or cover. The length and breadth of the pans is determined by the class of copying to be done. Always make the pan slightly larger than the paper used. The three sizes given below will answe...

## Chapters

- [PART I.--MISCELLANEOUS.](https://www.cyberlibrary.org/en/books/secrets-of-wise-men-chemists-and-great-physicians-46711/chapters/1/index.md)
- [PART III.--MEDICAL.](https://www.cyberlibrary.org/en/books/secrets-of-wise-men-chemists-and-great-physicians-46711/chapters/3/index.md)
- [PART II.--STAGE ILLUSIONS.](https://www.cyberlibrary.org/en/books/secrets-of-wise-men-chemists-and-great-physicians-46711/chapters/2/index.md)