My question is based on the information given in the book "the tangled origins of the leibnizian calculus", at pages 108  -109. I know that leibniz invented the stepped drum and used it to build the stepped reckoner - that first mechanical calculator capable of doing all four arithmetical operations. He also sketched a design for a different machine - the pinwheel calculator, designed a cipher machine, developed the binary arithmetic (based on 0 and 1) and established it's importance for computers, and even described in detail some of the fundamental principles of the modern computer (in his treatise "De progressione Dyadica"). With such achievements in hand, it's not an exageration to believe the statement in this book. So my question is, like many other questions of mine, can someone give a reference for leibniz's supposed machine? can someone give a reference for a drawing of leibniz machine (how does it look like?).

My question is based on the information on pages 108-109 of the book The Tangled Origins of the Leibnizian Calculus. I know that Leibniz

• invented the stepped drum and used it to build the stepped reckoner — the first mechanical calculator capable of doing all four arithmetical operations.

• sketched a design for a different machine‚ the pinwheel calculator.

• designed a cipher machine.

• developed binary arithmetic (based on $0$ and $1$) and established its importance for computers, and even described in detail some of the fundamental principles of the modern computer (in his treatise De progressione Dyadica).

With such achievements in hand, it's not an exageration to believe the statement in this book.

Can someone give a reference for Leibniz's supposed machine? Can someone give a reference for a drawing of Leibniz machine (how does it look like?)?