13x15 Grill? (Subject Edited)

You got it essayk! Since the ridges are actually between points there must be an extra point to either start or end the count. As on my example of the reverse side of the grill at the beginning of the post, the points are the dark spots. The ridge is at the top of the pyramid which requires one less ridge than points.

I searched grills on ebay until I found one that clearly shows the ridges. The ridge is in the center of the pyramid and the points are at the base of it.

I am wrong in this post (edited Aug 24, 13)

Another way to see what I am saying is after counting the points, count the spaces between the points. Plus each pyramid has four points, one on each corner. But at the same time one point is shared by 4 pyramids except those that are on the perimeter of the entire grill. Those points along the perimeter only share two pyramids with the exception of the four corners of the entire grill, there we find only one point on the external corner of the corner pyramid.

I am wrong here too (edited Aug 24, 13)

Buy a proper stamp ruler with grill measurements on it.

Will definitely give you more understanding how its works.

I remember my self being a stamp virgin and my first post about grills.

OK, OK ,OK, let let see if I can get this straight. The point and the entire pyramid refers to the same feature. The ridge is the top of the pyramid which actually is not a point because it is a ridge. Is it not reasonable to understand that a point comes to a point and a ridge is a straight line at the top of four converging slopes? A 4 sided pyramid has 4 equal triangle shaped slopes converging at the top to form a point with four corner points at its base. But if, as you are saying, the entire four sided pyramid is the point, the top of the point has a ridge which is really not a point. Yet, it can be argued that to the naked eye the tiny pyramid at least looks like a point. So, with the current definition of a grill, two equal opposing sloped triangles combined with two perpendicular opposing sloped non-triangles is a point. Makes sense

As an aside concerning grills, poor grill impressions in which neither points nor ridges are clear, look more like bumps or a flat checker board than pyramids. A ridge is non-existent. According to some grill specialists, these were most likely produced by stacking multiple sheets to pass through the grilling machine at the same time. It lowered production time but increased challenges to collectors. Just think about it, there are potentially lots more Z grills than believed. But no one will ever be able to prove it. So we actually have grill points and grill bumps. I think I am going to collect matchboxes.

Thanks Ray for your post on #88 colors: "A few shades for the US #88 E-Grill"

@quigngt
The conventional terminology for describing the parts of a grill impression was set down about a century ago in the work of Stephenson, Deats and others. You are of course free to invent terminology for your own purposes, but in making comparisons to the existing literature or in dialog with other collectors to avoid confusion or accidental misrepresentation it is important for you to know and use the standard nomenclature.
Here is the standard language:
It is true that grill points are pyramidal, and that they have four corners. However, the four corners make for only one point, not four as you have said. Because the apex of these pyramids is never a single point but is a small ridge of metal, the center of each point is called a ridge. Where ridges are present there is a one-to-one correspondence between ridges and points.

There is a class of points that do not have ridges, but end as "truncated pyramids" with the "square within a square" impression that does not come to a point. These however do not appear among the grills of 1867-69.

I hope this helps you see how your terminology is different from the standard.

Thanks essayk, and I really do mean thanks for your comments. Disclaimer: Any contradictions in what I have said or will say are not intentional, it is just that I am good at putting my foot in my mouth. My foot is poor nourishment for my mental capacities.

I did make a huge gaff by mistaking that the points of a grill were not the pyramid shaped points, rather the four corners of a single grill pyramid (4 corner "points" if you will in at least one dictionary definition of point). The post of a scan of a point with ridges actually reinforced the erroneous opinion I had since the "point" (in red) was a square with four sides and consequently four corners which are geographically speaking, 4 points. But I have learned that lesson well. I do not believe I have created my own terminology except possibly "pyramid". But even that is not a total fabrication by me since the term "pyramidal" has been used in other articles I have read in the past. Rather I attempted describe current terminology in a literal sense. It was supposed to have been taken humorously. But since I am not a professional comedian and no doubt I have a sense of humor that many do not share, I have failed to express my humor as I had truly wished.

"Stephenson, Deats and others" most likely did their best with terminology to describe a grill. I do not gripe them but at the same time, they did not fully succeed for all time. Taking their terms literally was amusing to me once I did understand their terminology. And lastly, I highly doubt that I am the only collector who got/gets mixed up as to just what and where a point is determined to be. I can at least hope that other collectors who read this will become as well informed in the features of a grill as I have become thanks to all of you.