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Uphill Both Ways

Volume 9 - Boston 1956


experts it could find. That mount was a vast improvement over the old methods, but can you see how primitive it really is compared to these mounts? Forget the setting, forget everything. Just l-o-o-k at it, and then l-o-o-k at this pair. One is sophomoric, the other sophisticated and mature.

When describing these mounts, dad explained that the difference in the weight in front of the pelvis in Camptosaurus and that behind the pelvis was perhaps 75 pounds, a remarkably small difference, one that was critical to his success. Can you see the right foot of Camptosaurus splayed out behind himself back along his tail? The weight of that leg and foot contributed to the balance and also gave a powerful impression of movement. That leg counterbalanced the weight of the fore girdle. Brilliant man.

Notice the other remarkable feature of this pair, a feature that was an expression of his artistic nature. Both skeletons are mounted with the sinuosity that he observed in lizards and snakes. He grew up with them in the desert, catching and examining them, observing how they ran, how they held their tails, how they moved. Go back to the comparison photo at the top. It is, again, remarkably superior to the old mounts that were more or less collections of bones standing woodenly, because this skeleton has a nice posture, leaning forward in the attitude of flight. But it lacks the serpentine shape of dad’s mounts. It’s spine- tail are basically flat. Compare it to the graceful curves in dad’s mounts. His are more realistic and graceful. Look at the tail of Antrodemus. It is curved in three dimensions - just like real lizards and serpents. That’s precisely what anything will look like when it is long and thin and moving.[2]

After dad had perfected his method in this pair, he rested. He never mounted another dinosaur. He had achieved the ultimate. He had achieved the ultimate in mounting techniques. Really. How can you beat that, a free standing, sinuous dinosaur, fleeing an attack, not a scrap of visible steel - and supported on an 8 inch-long support, grasping a narrow ledge with the toes of one foot, perfectly

2 I need to make one small point about something in the photo of Antrodemus. There is a dark line that appears to extend to the left from the middle of his right Tibia. You might wonder if that is the shadow of a vertical support that isn’t otherwise visible. It is not. That line is actually a sliver of shadow created by a narrow strip that starts rising upward rig ht at the end of that foot. It is the same one that extends up toward and under Camptosaurus who left foot is grasping its end with his toes. There were no visible supports for these two.

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