These articles include both historical and tutorial matters

- A Source Book for Rule Collectors: information on boxwood folding rules, sectors, Gunter's line and many more things.
- Monge's Procedure: Descriptive Geometry, an excellent visualization tool.
- The Slide Rule: once, it identified the engineer.
- Jam Nuts: it isn't obvious how to use them, and a familiar illustration is incorrect. Also, a discussion of engineering drawing texts.
- An HP-48 Companion: help for the absent-minded with everyday arithmetic.
- HP-48G Notes: built-in utilities of the HP-48.
- Matrices and the HP-48: working with matrices and vectors.
- Old Units of Length: a look at the arbitrary units devised through millennia for the measurement of length
- Cannon and Gunpowder: their history and lore
- Paper: a little paper lore
- The Quartz Wall Clock: what's inside
- History of Canals: world-wide
- History of Roads and Coaching: in the U.S. and Britain
- Kites, a brief history of this Chinese invention
- Psigate is a resource for web information on physical sciences and engineering.

- Building Collapse, why the World Trade Center towers fell so rapidly
- The Transporter Bridge at Newport, South Wales
- Elasticity and its Application to Beams
- Beams--the remarkable theory of beams
- Rivets, bolts and the design of steel connections
- Buckling is a primary mode of failure
- Early Development of Truss Bridges in America
- Rational Design of truss bridges
- The Burr Truss, an American wooden trussed arch bridge
- The Bollman Truss, a suspension truss
- Cargo Ships, general characteristics, with the Victory ships as an example.
- The Vortex, an exploration of this interesting type of fluid motion
- Hydrostatics, an introduction
- Bernoulli's Equation
- Open-Channel Flow
- Turbines and Power from Water
- Fans and Power from Wind
- Hydrodynamics in Flatland
- Orifices, coefficient of discharge with experiments.
- Water Hammer

- Trochoids, Etc.: trochoids and involutes and their applications, especially to gears.
- Cycloidal Gears
- Hyperboloidal Gears
- Constant Velocity (CV) Joints
- Planetary Gear Trains: an excellent kit is available.
- Old Gears: demonstrate the principles of gearing
- Machines: the elementary machines
- Mechanical Clocks
- Mechanisms: some fun with mechanisms, and the value of the old mechanisms course
- Electrolux: How an absorption-cycle refrigerator works.

A Review of Electronics: An extensive series of pages based on experiments that can be done in the personal or home laboratory. The emphasis is on enjoyment and intellectual pleasure, but there is much practical matter as well. The earlier pages are more basic, while the later ones try to cover all the interesting experiments that can be carried out at low cost with what is available, including vacuum tubes and gaseous discharges. Much can be done with only a DMM and a breadboard, much more with the addition of an oscilloscope. All the circuits have been tested; there is no pompous handwaving as in a university course. New pages are added continually at present, and old ones revised to fix mistakes and to include new material. The level is not really elementary, but it should be accessible to most interested persons with a knowledge of electrical circuits, and everything is explained from fundamentals.

- Reciprocity: two-port networks and the reciprocity theorem.
- The Backward Wave: the wave goes one way, the energy the other.
- The Smith Chart: understanding transmission lines.
- The Telegrapher's Equation: transmission lines in the frequency and time domains, especially telephone lines.
- Telephones: the EE-8 field telephone and the manual switchboard.
- Microphones: how all kinds of microphones work, with information on vibration and sound waves.
- Speakers: acoustic radiation, motional impedance and horns.
- Breadboard a Computer: learning about computers with the 6504.
- Basic Circuits: DC circuits and circuit diagrams, and how to solve DC circuits.
- AC Essentials: how to solve alternating-current circuits.
- Transformers: the most useful electrical machines--the inside story.
- Three-Phase: understand it via phasor diagrams.
- Salient-Pole Motors: the early history of electric motors.
- Generators: How electric generators work.
- Jacobi's Theorem of maximum power transfer and its effect on dynamo design.
- Electrical Machines: how electrical and mechanical energy are transformed into each other.
- Learning Electricity through experiments. Links to electronics suppliers.
- Electromagnetic Induction: can you give the answer?
- Ranging: a look at methods
- Electrical Engineering Review

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