By adopting a sedentary way of life, the Neolithic groups increased their awareness of territoriality. During the 9600-6900 BCE period in the Near East, there were also innovations in arrowheads, yet no important changes in the animals hunted was detected.
3. Poor screen preparation is a major cause of pinholes. Particles of dirt, wood frame chips, and dust remaining on the fabric during coating will be trapped in the emulsion. Opaque, they will block light from hardening the emulsion beneath them, so that the emulsion in these small areas will wash away after exposure.
reply to ?????: the difference in feel depending on whether pin is installed or not suggests the possibility that the pin might be placing the trigger bar and disconnector in a bind with each other. If pin holes in housing and frame are misaligned installing the pin will create a bind. And just maybe, and unlikely, that installing pin from left to right might push the mechanism to the right of the cavity, pinching the trigger bar and disconnector. It could also be that the hump on the bar that rides under the disconnector ramp has been honed and polished to a knife edge where it rubs in the corner of the disconnnector fold.