A fascinating overview of some small technologies (string, anyone?) that have had a huge impact on the way the world has developed. ( )

I've been fascinated with simple (and complex) machines since I can remember, so this is a book that calls out to me. Being an engineer, this was more than appealing, but obviously one need not be one to enjoy it. Ms Agrawal has written a delightful book that is easily a single-sitting read (after which I sat for a couple of weeks before writing this.) She gives the history of her revided simp[le machines, expands on some particulars of their evolution to contemporary uses, and connects with personal experiences - example: learning to make nails with a blacksmith.

Ms. Agrawal updates the traditional six simple machines of inclined planes, levers, wheel and axles, pullies, wedges, and screws to seven: the nail, the wheel, the spring, the magnet, the lens, the string, and the pump. She says herself, "During the Renaissance, scientists and engineers defined six 'simple machines,' described as being the basis of all complex machines. These were the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. But today, those six feel outdated and insufficient. So, I got rid of a few and added some others to showcase seven elements that I believe form the basis of the modern world." And she says, "In the pages that follow, I will show you that engineering is the meeting of science, design, and history." Yep. I started out long ago majoring in physics, and along the way determined that I enjoy application more than theory.

You may learn a few things, and I think you'll enjoy the ride. I did.

Note: I received an advance uncorrected proof from the publisher through NetGalley and when it comes out, I'll be looking for it to add to my library so I can loan it out to friends and family.

I didn't take a lot of notes; just a going with the flow kind of read.

"One, Joe Fosset, toiled in the nailery from the time he was twelve, alongside other young boys who together made between 8,000 and 10,000 nails every day by hand— enough to fund the Jefferson family while the depleted soils of the plantation replenished themselves during fallow years."
{Per day??? Toiled might be an understatement. I've tried my hand at smithing - my father had a small forge, anvils, and a large battery of tools. I had thought I'd like to have that one day, but smithing takes a hard toll on the body.}

"Someone really did have to invent the wheel - or, at least, in the way in which it was used. And it does seem to have a leap: most inventions evolve over time. A naturally sharp piece of rock, for example, inspired us to sharpen other rocks into tools, and gradually we began to attach them to handles, long poles, or arrow shafts— but with the wheel and axle, there’s no such evolution in getting to its basic form. It either works or it doesn’t."

{I need to go find Invention of Miracles by Katie Booth.}

"The most rewarding— and disconcerting— day of my career as an engineer was standing for the first time on the solid steel deck of the Northumbria University bridge. Eighteen months earlier, when I started my first full- time job, I was handed designs for this beautiful structure. I marveled at the fact that what was then only a notion would one day become a fully formed, three- dimensional reality. When that day arrived, I traveled to Newcastle (hoping I’d done all the math right) to stand on the steel that I had previously seen only on paper."
{This made me happy. Too often, engineers don’t go look at their work. I was managing the rehab of a water pumping station and had to force the design team to actually bring their electrical engineer out to verify the control panels were installed to his specs. And on a data center project, one of my technicians pointed out to the design mechanical engineer - who did make plenty of site visits - that an access panel would be blocked if we expanded the system (by design intent) to add another CRAC unit. That engineer got to see first hand what the problem was and was able to design up a quick fix. (And, he was rightly embarrassed.)}

[On a specific type of pumps - an artifical heart] "Rohin said that tall people often end up struggling to get a donor because you can put a big heart into a small person, but not a small heart into a tall person: it wouldn’t be strong enough to get the blood to the longer extremities. (He added that this, and sitting comfortably in economy seats on a plane, are the only two wins for short people.)"
{Chuckle out loud. I think we have more wins than that.} ( )