Sallen and Key's classic 1955 paper
in [Basics]
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From: The Phantom on 24 Nov 2009 20:43 On Tue, 24 Nov 2009 15:24:58 -0800 (PST), Wayne <wayne.little(a)gmail.com> wrote: >On Nov 24, 11:31�am, George Herold <ggher...(a)gmail.com> wrote: > >> >> Wayne please keep us posted. �I went to the University of Buffalo >> library website and tried to find the article.. .same story that you >> are getting. They have the second and all other volumes in the series, >> but someone lost the first volume! >> >> George H. > >George et. al., > >I have successfully contacted the Linda Hall Library in Missouri and >they do have Sallen and Key's original paper. There is a fee of $37 >that includes the copying of the paper and the IEEE copyright. Their >web address is: >http://www.lindahall.org. Have you already ordered it? If not, I discovered I have a copy which I can email to you. > >-Wayne
From: Wayne on 24 Nov 2009 21:45 On Nov 24, 5:43 pm, The Phantom <phan...(a)aol.com> wrote: > > Have you already ordered it? If not, I discovered I have a copy which I can > email to you. Not yet, so if you have a copy it would be nice to obtain one for free. Several others would like a copy as well. :-) Thanks in advance. -Wayne
From: Don Klipstein on 24 Nov 2009 23:03 In <f6d7b34f-99a0-4f4e-bbd4-20653f1f2353(a)o13g2000vbl.googlegroups.com>, George Herold wrote: >On Nov 23, 5:52=A0pm, Jon Kirwan <j...(a)infinitefactors.org> wrote: <And I snip everything otherwise getting 2-plus quot. symbols / line> >Hi Jon, You shouldn't let yourself get too upset. This kind of thing >happens all the time in academia. (And probably in industry too.) >Everyone tends to 'parrot' what has been done before. I'm a physicist >and if you look at intro physics texts they all tend to be the same. >I'm reminded of an instance documented by Stephen J. Gould in one of >his books of essays. In all biology books you will find that the >first horse. (please don=92t ask me to quote the scientific name, I >think the name means 'dawn horse') is referred to as an animal that >was about the size of a fox terrier. Now fox terriers are no longer >a breed that is at all common and yet everyone writing about the first >horse uses the same copied analogy. Gould follows the comparison >back to the first mention of this fossil horse and finds the original >reference there. > >Anyway there are lots more examples of this. Bottom line, we all tend >to be a bit lazy. The "dawn horse" is eohippus. My impression is that eohippus was about the size of a usual domestic cat, or a bit smaller - about the size of a smalish domestic cat. My impression is that eohippus was an early stage branching of evolution of mammals from something more like a rat to something first stage of towards horse from more-like-a-rat. This could be close to where hooved herbivores evolved from common ancestor of hooved herbivores and modern rodents. "Eo" means dawn, and is used elsewhere - notably in a traditional-in-science dye, eosine. That organic dye is "dawn-pink" in color in a common form/concentration, though usually fluoresces a yellowish shade of green like fluorescein, which eosine is a derivative of. Another fluorescein-derivative is erythrosine, named for being blood-red in a common form/concentration, and that also often fluoresces yellow-green. =============== The Wikipedia article that I get from "eohippus" shows that to be a genus rather than a species, and appearing to me to me to be early stage evolution of ungulates, related to then-present ancestry of rhinos and tapirs. This Wikipedia article takes on the title "Hyracotherium", and "therium" makes me think prehistoric rhinos. That article mentions that this was earliest "equidae" before being reclassified as a "paleothere" related to both horses and "brontotheres" ("brontotheres" are literally "thunder beasts", an extinct family of "somewhere-between-horse-and-rhino likely-closer-to-horse" "My Words"). (Brontotherium included the Baluchitherium, a "hornless rhino" larger than any elephant in history and probably larger than every prehistoric one probably including all "mammoths".) This "greater family" ("My Words") of mammals here is "Perissodactyl" or "odd-toed ungulates", a classification great enough to be at least often referred to as being of status of an "order" (Perissodactyla). Eohippus now looks to me so far as I see roughly 60 cm in length typically, sounds to me roughly slightly larger than a usual domestic cat, likely more than double linear dimensions of a usual rat and likely 10-plus times the mass of a usual rat but still very small for anything most-related to horses let alone rhinos. - Don Klipstein (don(a)misty.com)
From: George Herold on 25 Nov 2009 13:14 On Nov 24, 11:03 pm, d...(a)manx.misty.com (Don Klipstein) wrote: > In <f6d7b34f-99a0-4f4e-bbd4-20653f1f2...(a)o13g2000vbl.googlegroups.com>, > > George Herold wrote: > >On Nov 23, 5:52=A0pm, Jon Kirwan <j...(a)infinitefactors.org> wrote: > > <And I snip everything otherwise getting 2-plus quot. symbols / line> > > > > > > >Hi Jon, You shouldn't let yourself get too upset. This kind of thing > >happens all the time in academia. (And probably in industry too.) > >Everyone tends to 'parrot' what has been done before. I'm a physicist > >and if you look at intro physics texts they all tend to be the same. > >I'm reminded of an instance documented by Stephen J. Gould in one of > >his books of essays. In all biology books you will find that the > >first horse. (please don=92t ask me to quote the scientific name, I > >think the name means 'dawn horse') is referred to as an animal that > >was about the size of a fox terrier. Now fox terriers are no longer > >a breed that is at all common and yet everyone writing about the first > >horse uses the same copied analogy. Gould follows the comparison > >back to the first mention of this fossil horse and finds the original > >reference there. > > >Anyway there are lots more examples of this. Bottom line, we all tend > >to be a bit lazy. > > The "dawn horse" is eohippus. > > My impression is that eohippus was about the size of a usual domestic > cat, or a bit smaller - about the size of a smalish domestic cat. > > My impression is that eohippus was an early stage branching of evolution > of mammals from something more like a rat to something first stage of > towards horse from more-like-a-rat. This could be close to where hooved > herbivores evolved from common ancestor of hooved herbivores and modern > rodents. > > "Eo" means dawn, and is used elsewhere - notably in a > traditional-in-science dye, eosine. That organic dye is "dawn-pink" in > color in a common form/concentration, though usually fluoresces a > yellowish shade of green like fluorescein, which eosine is a derivative > of. > Another fluorescein-derivative is erythrosine, named for being blood-red > in a common form/concentration, and that also often fluoresces > yellow-green. > > =============== > > The Wikipedia article that I get from "eohippus" shows that to be a > genus rather than a species, and appearing to me to me to be early stage > evolution of ungulates, related to then-present ancestry of rhinos and > tapirs. This Wikipedia article takes on the title "Hyracotherium", and > "therium" makes me think prehistoric rhinos. > > That article mentions that this was earliest "equidae" before being > reclassified as a "paleothere" related to both horses and "brontotheres" > ("brontotheres" are literally "thunder beasts", an extinct family of > "somewhere-between-horse-and-rhino likely-closer-to-horse" "My Words"). > > (Brontotherium included the Baluchitherium, a "hornless rhino" larger > than any elephant in history and probably larger than every prehistoric > one probably including all "mammoths".) > > This "greater family" ("My Words") of mammals here is "Perissodactyl" or > "odd-toed ungulates", a classification great enough to be at least often > referred to as being of status of an "order" (Perissodactyla). > > Eohippus now looks to me so far as I see roughly 60 cm in length > typically, sounds to me roughly slightly larger than a usual domestic cat, > likely more than double linear dimensions of a usual rat and likely > 10-plus times the mass of a usual rat but still very small for anything > most-related to horses let alone rhinos. > > - Don Klipstein (d...(a)misty.com)- Hide quoted text - > > - Show quoted text - Thanks Don, The bottom of this wiki article has the Stephen Jay Gould reference. http://en.wikipedia.org/wiki/Hyracotherium But you have to read Gould's essay. George H.
From: Baron on 25 Nov 2009 16:51
Wayne wrote: > On Nov 24, 5:43 pm, The Phantom <phan...(a)aol.com> wrote: > >> >> Have you already ordered it? If not, I discovered I have a copy >> which I can email to you. > > Not yet, so if you have a copy it would be nice to obtain one for > free. Several others would like a copy as well. :-) > > Thanks in advance. > > -Wayne Yes please. -- Best Regards: Baron. |