My own diagram of the inside of a real seashell, above, was drawn and published previously.
Post of 4 May 2013.
The very inside is shown to be paper thin.
This model above has been published earlier (post of 19 January 2012) and subsequent posts, in "A Proper Pattern" which has had more than 500 pageviews already. It is not a perfect
crochet pattern yet, the top is tricky; am working on it.
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Here are two new efforts, just tentative ones. I wondered what shape would come if one used the algorithm I discovered in 2010 to make the first seashell models...
ie
Fn = 2Fn-2 + Fn-3 of the Fibonacci Series.
eg .... 13=2x5 +3, 21=2x8 +5, 34=2x13 + 8, 55=2x2x21 +13, 89=2x34 +21, 144=2x55 + 34. etc.
The top image (144 stitches crochet) is like a top shell.
The lower image (89 stitches crochet) is like a whelk.
The difference is the 2x side is one one side in one model, and it is one the other side for the other, ie 144= 2x 55 + 34 versus 89= 21 + 2x55.
The 2x area of the Fibonacci fan skews the frilly edge one way or the other.
Also the thin central portion of the Fibonacci fan is accordingly placed.
Here the stiching up of each item is as recently determined = nothing like the way it was done in 2010.
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I am working on 3 more different models, not finished yet. Very tricky. One tries one way and it doesn't turn out quite as expected. So one has to start again and again, experimenting.
There are 2 more permutations for the above algorithm equation,
ie 144 = 17 + 2x55 + 17, maybe this might become a bubble shell? skew is in the middle.
or,,,, 34 = 2x13 +5 one row, turn, 55 = 2x21 + 13 next row, etc, so the skew is even over piece.
Plus make a plain row between each increase row...
put stripe rows of a different colour in to designate particular rows...
Plus how much of the model needs to be paper thin in the middle? 1.2? 1/3? 1/4?
Then there is the usual algorithm I use
ie 4 crochet stitches make 7 which is adjusted to 13 makes 21 stitches
**Plus the new, for me, algorithm of 4 stitches into 5 ie crochet in 3 then 2x into 4th, making 5.
My reckoning is that this fits the fibonacci series together with the half fibonacci series, published earlier.
Here one fibonacci number made into the next fibonacci number takes 2 rows' work
whereas the 13 to 21 algorithm does it in one row.
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Meanwhile it is autumn and peaches (three trees full) are ripe.
Making jam and preserves is all done now, and I might just get around at last to focusing on these seashell models, that is, if I don't get distracted by something else.
Summer has been terribly hot in my caravan- 34 degrees C even up to 37, 39! At least we have survived - no bush fires this year in our region, tho it has been fiendishly dry - no rain.
Gorgeous parrot. Maybe a rainbow lorikeet, but I do not know my bird names exactly. Birds enjoy gnawing at fruit. The Black Swamp Wallaby and maybe a fox have been feeding also. Plenty for us all. One has to collect up all the fallen fruit and put into black plastic bags into a bin to compost and to kill any fruit fly. Luckily only a few fruits have inside rotten brown with fruit fly this season.
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