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I have completely forgotten everything about using a slide rule..in pre computer times we used them all the time at school...this was Mrs Nahpro' s I think..
---- from chaos some my black and white demons .... ----
---- dal kaos alcuni miei demoni in bianco e nero .... ----
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While I'm in the mood for tabletop photography, here are some ghosts of "Napier's Bones"...
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Stop Press. After the initial upload I found a fascinating resource, International Slide Rule Museum (ISRM). There I learned four things that amazed me.
1) 2022 is the 400th anniversary of the invention of the slide rule by William Oughtred!
2) ISRM indicates that 1901-1902 Nestler models were stamped on the slide cavity with just the manufacturer's initials, AN, plus a design patent number. My grandfather's rule here clearly shows that. So it is now identified as a Nestler, and about 120 year old. It might be quite rare. It is longer than the maker's 10" rules, and shorter than their 20" models, yet it has the same graduation density as the larger ones. I haven't yet seen any the same. (See also last paragraph below, and images in comment thread.)
3) Various web sites claim that the German rocket scientist Wernher von Braun acquired in the 1930s two Nestler slide rules, the only ones he ever used, including while heading the NASA Moon landing program. Albert Einstein is also claimed to have used these rules. They must have had a stellar reputation!
4) In my youth I'd believed that Faber-Castell was the only brand, yet one of the favourites of the ISRM was made in my home town of Melbourne, and I had never heard of the maker!
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On acquiring one of the first scientific calculators available, someone in my wife's family ceremoniously flung his slide rule into the rubbish bin. But I was sad to see them slip ignominiously, from ubiquity in technical computation settings, into museum status. (My wife recovered that rule and it is in this image.)
I remember when, as a schoolboy, I unwrapped my first model, and, using only its own scales and cursor, immediately fell to verifying a hunch that its principle was based on logarithms. "Duh!", anyone with a maths background might say. But at the time, I felt that I had cracked a code and let myself in on an esoteric language that was openly inscribed in runes on this magic wand, yet which had been hiding from me in plain sight all along.
I have lost that one, which had scales on both sides, a Faber-Castell Darmstadt 2/82 -- but the one nearest the top of the frame here is a grander version of that. This latter was the most sophisticated I ever owned (with a useful πX scale), and it was made right at the end of the ready availability of these devices locally. But I hardly ever used this replacement because I only bought it in case I'd never get another chance. To me, they were and still are strangely beautiful so-called "objects of virtu". They are the very physical manifestation of that wonderful abstraction of the human mind, logarithms. (Something remarkable and elegant is vital to the practicality of a slide rule, although it can be conceptualised in other ways. Since the full scale length represents log(10), any internal position X must divide the scale length in the ratio log(X):log(10/X). That enables both multiplication and division to be performed with either left or rightward slide shifts as appropriate, and so allow a single decade to suffice -- but at the cost of requiring users to keep track of the decade they are notionally in.)
The rule lying diagonally above the others here was the first I ever knew, as a small intrigued boy, long before I understood what it was for. It has lost its (glass) cursor, while some of the scales have peeled away from the wooden substrate. Because the material looked and flexed like the struts in my mother's corsets, I always assumed it was whalebone! The device had belonged to my maternal grandfather, who had been a civil engineer in Austria. He might well have used it in calculations required for a bridge he built over the River Inn (see a very early comment below). My mother and I tried to see that in 1996, but it had already been consigned to a rubbish bin for bridges... Tempus fugit.
Happy Sliders Sunday - HSS!
This night vision windshield & camera lens were well worth the money. Eliminates any need for street & headlights. :0)
i did so much to this, or rather, had so many versions, i can hardly remember what i slid. i know i boosted blues and greens, took out some other saturation and contrast, did some masking and softening in general, added a little lens vignetting, but i really have my strobes to thanks…strobist info: television to the right, lol!
below is the REST of this glorious hat (plus some cool light reflection effects around my eye!), and the sooc original.
So BAM! and Happy Sliders Sunday, friends!! Hit L! :)
if you like this, you should see the copycat
The Slide
Unnamed stream
High Rock Hideaways
Hocking County
Last month my wife and I took a much needed vacation with our pup Maggie to Ohio's Hocking Hills region. We stayed at a cabin at High Rock Hideaways located not far from Ash Cave. A recent post I had seen in the Hocking Hills group intrigued me when I saw that the property boasted 9 waterfalls on their own trails. Booked. Our first day there Maggie and did some exploring on the trails so I could get a feel for the area but some light drizzle had me thinking we better return and it was a good idea. Within 15 minutes of arriving to the cabin it was raining. The next afternoon I headed out to explore these waterfalls more closely. The first falls I visited was called The Slide. Arriving at the top, it was a steep cascade waterfall that dropped at least 40 foot into a mini slot canyon. While standing there I noticed an undocumented arch in the cliff opposite the falls. Going to take a closer look at the arch I discovered a manageable scramble downstream from the falls. The scramble took me past two more waterfalls which were not really worth shooting. Once in the gorge I had to do some creek crossings and then a short scramble up the base of the falls which was a short dog leg to the main drop. Wow! I couldn't believe my eyes! Hands down one of the regions prettiest waterfalls and was the icing on the cake of a great trip with my wife and pup!
Ohio
I didn't have an opportunity to take a new photo today. So... here are two photos from yesterday!
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"Does your husband know the way
That the sunshine gleams from your wedding band?
Well, I will never end up like him.
Behind my back, I already am."
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Headfirst Slide into Cooperstown on a Bad Bet - Fall Out Boy
www.youtube.com/watch?v=jzgfLaJazSA
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Production notes:
Two shots of my right eye.
One flopped.
Slide blended together in the center with a gradient layer mask.
Otherwise, unretouched.
Location: Unknown
Date: July 7, 1997
Photographer: Unknown
A wonderful Soo Line scene with no information on the slide mount other than a dater.
From a digital scan from my personal slide collection.
When covid came along many of us had to grow our hair long. It was quite an undertaking for my very thick frizzy hair and I needed varied tools to keep it in place. This was called a slide but much different from what I knew as a slide. I have them in 3 different colours. I played with combining some in different ways this morning.
Thank you so much for sharing your quality photos which is a great way to see and keep some sort of touch with the world from home. Also for your kind comments and favours which are much valued.
I am not able to take on any more members to follow or to post to groups
Happy Sliders Sunday!
Pedal cars at the Pinery Flea Market, Grand Bend, Ontario in 2012.
Pencil water colour edit.
Happy Sliders Sunday!
Subtle fisheye effect on a country road photo snapped just outside of town back in late winter of 2014.
---- from chaos some my black and white demons .... ----
---- dal kaos alcuni miei demoni in bianco e nero .... ----
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Light caroms off the closely set walls of upper Paria Canyon, and brings out striking colors and textures from the facets of Slide Rock Arch, Paria Canyon Wilderness, Utah; day 1 of 3-generation backpacking venture. It is difficult to appreciate the scale here, but full-grown people can readily pass through the arch walking abreast.
The day started out auspiciously enough, with a great deal of racing about in the water by my 7 year-old. I had stocked him up with a large packet of gummy bears that was meant to last him the entire 5 days, and we had decided to store those precious sugary bears in his hip belt pocket on his pack, for easy access. However, as it transpired, he decided to leave the zipper on the pocket open, apparently because it 'just takes too long' to have to unzip when you're jonesing for a piece of gummy foodstuffs (he cracks me up, really). Combined with his energetic navigation of the shallow river channel, it was really no surprise, at least not to me, when he discovered that the bears were no longer in his pocket at all, and had gained the freedom of the river channel, probably deciding to swim for it, rather than risk a pocket-bound journey with my son as their overseer.
At this point, we had probably hiked only a mile and a half or so from the car, and the look of sadness on his face was so profound that I hastily dropped my pack in a willow thicket by the side of the canyon, and decided to run back up the channel in search of silty gummy bears. As it happened, I didn't see them on the way up, and ran all the way back to the trailhead, as the noon temperatures began their crescendo. Of course, I didn't bring any water with me, since I foolishly thought I'd find the bears before I made it back this far. So, I turned around, and began the hot jog back to my pack, eyes still scanning the channel that stubbornly refused to reveal its gummy foods - the silty water makes this a somewhat easy feat, really. But lo! There they were just coming out of a deep pool in which Kieran had been exuberantly splashing some 45 minutes previously. Ah sweet success. Sweet silty success. As they took on water, the bears also took on silt and sand, and this had fused them into one giant mineral-rich, sugary, gelatinous mass. I hoped Kieran would be happy, but I didn't hold out high hopes.
Upon returning to my pack, I gratefully grabbed a water bottle and drank a liter. It was then I discovered that the willows in which I'd stowed my pack had also played host to a dead animal at some relatively recent point in the past, and the putrescine had been strong enough to infuse my water bottle spout with eau d'mort. But damn, I was thirsty, so I had to fight through that wonderful sensation. So that's what kind of day it was going to be, then, eh? But no, all these tribulations ceased once the afternoon light began to play on the red sculpted walls.