Talk:Johannes Diderik van der Waals/Draft

Approval nomination

I'm no scientist but in my reading this clearly needs to be nominated for approval.  —Stephen Ewen (Talk) 14:11, 1 October 2007 (CDT)

I agree. I made some minor changes, and I wonder if it would be possible to add references to the major works of him, so that people actually can find those if they want. I moved some stuff to subpages, and I need some definitions of terms in the related articles section, which could use probably a few more. Kim van der Linde 07:05, 19 October 2007 (CDT)

I added a few references to Van der Waals' major works and their translations.--Paul Wormer 08:40, 19 October 2007 (CDT)

I added references to the bibliography subpage, almost simultaneously with Kim adding the same references as footnotes to the main text. (It is most likely no coincidence that we added the same references, I got them from the site of the Dutch Academy and I bet Kim did the same). Now the question is, do we keep both sets of references? Or do we keep one? If the latter which one: footnotes or bibliography? Is there a CZ policy on this?--Paul Wormer 03:55, 20 October 2007 (CDT)

In-article footnotes would be for works you are relying on to craft the article, I'd think. The Bibliography subpage here could contain all of JDvdW's works plus whatever relevant scholarly work about him you deem fitting. Stephen Ewen 05:24, 20 October 2007 (CDT)

I can see the value of the references to the actual articles, but it can also be done by referring to the bibliography. I agree with you to include the sources that were used for making this article. Kim van der Linde 15:54, 22 October 2007 (CDT)

I think the references have to be improved before approval - currently, the in-text ones are all in the first paragraph of Scientific_work, while the rest of that section goes unreferenced, as does the biography part. For the latter, I would suggest to refer to the biography at the Nobel site which seems to have been used as a source anyway (see Johannes Diderik van der Waals/External_Links), as is also evident from the phrase "thesis ... put him at once in the foremost rank of physicists". For the former, I suggest to add the relevant references to the cited work of Andrews, Dewar, Kamerlingh Onnes and Laplace. I removed the ToApprove template but am willing to support approval once the references have been updated. Daniel Mietchen 17:11, 23 April 2008 (CDT)

Are you sure you want references to Andrews (around 1860), Dewar (around 1890), Kamerlingh Onnes (mostly in Dutch, around 1900) and Laplace (mostly Latin/French, around 1800)? I composed this biography mainly from a Dutch book given in the biography, a site of the KNAW (Royal Dutch Soc.) given in the external links, the Nobel site (also in the links) and a Dutch 20 volume encyclopedia (not listed). The biographical facts in these sources overlap and agree. Would you like me to write: "J.D. was born in Leiden", see Refs. 1,2,3, and 4? I have here the 15th ed. of the EB, there is not a single reference in the article on van der Waals (which, btw, is under "Waals" with a redirect under "van der Waals"). --Paul Wormer 17:44, 23 April 2008 (CDT)

I agree with Paul that the references are adequate. Daniel seems not to challenge any of the points that are made--but please keep in mind CZ is not Wikipedia, which is a nest of distrust and fear of experts so that every fact has to be referenced.Richard Jensen 18:08, 23 April 2008 (CDT)

In my eyes, references do not just serve as a currency of mistrust. Instead, I perceive them as very useful from a didactic point of view and as an incentive for learners to dig deeper. Anyway, I added references to Andrews and Laplace and have no objections to approval any more. -- Daniel Mietchen 10:41, 24 April 2008 (CDT)

I won't remove the references to Andrews and Laplace, but to me they seem out of place in an article on the person Van der Waals. In articles on criticality and viscosity they would fit. In my opinion wikilinks to Andrews and Laplace would have been more than enough in the present article (BTW, how certain are you that Laplace denies the molecule concept in the article that you quote?). Kamerlingh-Onnes is a different matter, because he recognized in several articles his debt to Van der Waals, who was the theoretician behind his experiments.--Paul Wormer 12:01, 24 April 2008 (CDT)

I'm fine with moving the references over to the other articles once they exist, but for the moment, I prefer to have them in here, so as to keep the flow nutritious. As for the Laplace reference, I had put it in because I knew it as the one relevant to capillarity. I hadn't checked back what he stated there about the existence of molecules, though. When I did that now, I found that, right on the first page of the first of the two supplements to book X, he mentioned "attraction de ... molécules" as being the cause of "l'action réfringente des corps sur la lumière". He thus did not deny the concept of molecules. I also browsed the document (which, unfortunately, is not searchable) for mentions of molecular motion but found none so far. So I rephrased that passage acordingly. -- Daniel Mietchen 07:41, 25 April 2008 (CDT)

APPROVED Version 1.0

Two things to notice here. 1) There are a few edits that were not included in the approval as they were not included at the time that Richard Jensen placed the approval. 2)Daniel placed a 'removal' notice on the metadata template that I had not noticed (and never seen before - so this is new to me) that removed the approval tag on April 23rd. SInce his edits are not included, I suspect there might be some further instructions for what needs to be done. My feeling is that the approval should be removed unless both Richard and Daniel agree to this approval (and of course Paul can make it three). I will let each of you take a look and let me know if you want me to keep the approval in place. --D. Matt Innis

Discussion for Version 1.0 stopped here. Please continue further discussion under this break.

Changes were made and Daniel explicitly removed his removal and said he has no objections now. I approve all the little copyedits.Richard Jensen 13:25, 29 April 2008 (CDT)

Yes, I approve the current version. -- Daniel Mietchen 03:35, 30 April 2008 (CDT)

Good news then. I'll leave it as it is. --D. Matt Innis 07:36, 30 April 2008 (CDT)

Error in lead-in of approved article

Somebody introduced a serious error in the approved version of this article.

Explanation:   By definition, two or more stable (chemically bound) molecules constitute a van der Waals molecule if they are bound to each other by van der Waals forces. These forces are weak and therefore a vdW molecule is rather unstable (that is, a vdW molecule can only exist at very low temperature and will decompose at higher temperature into its stable constituents).

Now, the third sentence of the leadin reads:

His name is also associated with van der Waals forces, which are forces between stable molecules (van der Waals molecules), i.e. (small) molecular clusters bound by intermolecular forces, ...

This sentence says that stable molecules are called van der Waals molecules (quod non) and furthermore the i.e. clause is dangling, what does it refer to? --Paul Wormer 09:40, 1 May 2008 (CDT)

Hi All, no problem, this is a good example of a copyedit that makes content changes depending on the sentence structure. Once everyone has had a chance to look it over and decide on the appropriate change (if necessary), let me know and I can step in at that point. --D. Matt Innis 10:09, 1 May 2008 (CDT)