tv Reel America Vision USA - 1974 CSPAN July 4, 2020 10:21pm-10:47pm EDT
john brown attacked the town and captured the arsenal. thought he had a divine commission to destroy slavery. after he was captured and hanged , the people of the north looked upon him as a martyr to because of abolition. >> i'm trying to preserve the spirit of individualism by using my hands to make things. i am making a personal statement, a sort of prayer. for 13been a pewtersmith
people are hungry for works with personality that have been touched by human hands. >> this photograph conveys a great deal of useful information. dimensions, in two it fails to reveal the subject is very appealing. this photo conveys much more information because it is in three dimensions and we comprehend in that way. the scanning electron microscope evolved because scientists needed an instrument to see in three dimensions in the microscopic world. looks like ae mesh flat diagram when photographed through a conventional microscope.
knowledge and technical skill are required to interpret it correctly. viewed through the scanning electron microscope, the mesh is seen in three dimensions. it is more immediately recognized and understood. microscope, developed through research, is an outgrowth of the conventional microscope. it resembles a closed circuit television system. this is a three-dimensional view of human blood sales. the image can be enlarged up to 30,000 times. as with other microscopes, images can be photographed.
seeing the size and shape in three dimensions enable scientists to relate shapes with diseases. if an observer wants to get a view inside the red blood cell, he can blast away the surface membrane with electrically charged atoms and get a look at the structure underneath. animal looksna like this. under the conventional electron microscope, the jaw becomes a diagram. with this microscope, we can see the architecture of the jaw. called e. coli are bacteria found in the human: colon. when exposed to penicillin, these bacteria die.
this shows us the process at work. the disintegration of a harmful bacteria. the eye is a window through which we view the passing world. if we examine this remarkable microscopic, it looks like a view of a distant planet sent back by a spacecraft. looking at the cells of the human cornea. the familiar light microscope has a magnification of 1500 times. the conventional electron microscope can magnify up to 300,000 times. the scanning electron microscope can magnify up to 30,000 times. to science is how it
sees. a new world emerges. these are rare glimpses of commonplace things. of the newlose-up york times. this is not a cactus, but a neverof pollen felt but seen by hayfever sufferers. this is not an archaeological dig but a view of the layer's the human tooth. conesese are the rods and of a salamander's eye. this grove is human hair. the tinyhe eye of animal we saw earlier. tongues is a view of a tip, taste buds visible on the stems. electron microscope
let's see the shapes of worlds within worlds and gives a scientist a vital tool for the benefit of all mankind. in the dead of night, while others sleep, they begin their day. a long day. most of it to be spent on the shores of maryland. gil and his son get oysters from the chesapeake bay. watermen relish the challenge of the unknown. once there were thousands of them, but the number has dwindled because of pollution .nd overharvesting
young people can find easier jobs. even so, the traditional oystering goes on. efforts have been made to protect the oysters. like bob can continue the work of their fathers. >> start her up. >> ok. small craftis a with bits and pieces of machinery locally bought. allwinches, the pulley, installed and maintained by father and son.
oysters lie on the top of the seabed and are harvested with tongs. the loss of oysters that can be harvested, if there is a , it is thrown back to grow for another year. working together, gil and son are able to get home sooner. the money bob earns he will use to make the operation even more efficient. >> how long are you going to be?
bucket by bucket, the loading of the oysters begins. large, refrigerated trucks weight to claim the catch. oysters are considered a delicacy in the united states and giant trucks will carry them across the eastern seaboard. finally the end of the 13 hour day is at hand. is paid and the oysters are on their way to the table. for two centuries, the watermen
watch powered by a spring keeps accurate time to within four minutes a month. withintch is accurate one minute a month. the newest watch uses a tiny a crystal,stimulate accurate within one minute per year. precisets watch is more than the testing machine can measure. 99% of all watches are balance wheel watches powered by a mainspring. accountern watches will for an increasing number of watches sold worldwide. of quartz watches is expected to increase throughout the world as new technology becomes widespread.
much of the technology behind the timekeeping came from the miniaturization developed by the space program. the united states has imported more than 60 times its exports in watches and parts. a slow reversal has begun. the production of transistors and tiny circuits and the production of quartz and liquid crystals has begun to change the world marketing outlook. the new quartz timepieces look like conventional watches. digital models are very different. digital watches are not yet perfected and are very expensive. some believe they will become very popular. the new quartz watches are the beginning of a more accurate era in timekeeping. watchmakers are slicing time into salt smaller and more
accurate pieces. we see the results in an array of attractive new faces. she started using a camera in 1925. today barbara morgan is one of the out bending photographers america has produced. . with ansel adams, she developed a method of processing photographic prints which will last for centuries. world askroughout the barbara morgan to make the prints for their archives. she was among the early american
photographers to work in photomontage. her montages combined her basic nature, the rhythmic forces and the structure of things. long before the environment became a source of public concern, barbara bogan was creating images that would relieve the threat to our national environment -- natural environment. in the 1920's, barbara married willard morgan, they would pile into the jalopy and head for the southwest. she to paint and he to take pictures. camped out in the desert, they
would study and photographed the region. her observations of indian heral dances influenced series of photographs. years, her dances were reconceived for the camera in barbara morgan's studios. she did not photographed the literal dance, but the movements that were aspects of each dance to the photographer. seen it, int i had had the feeling she had some contact spiritually with indian ritual. martharange state i met and asked her that question. she said of course. i am deeply involved with the indian approach.
>> almost all of her images are metaphors. she has a vision of order and harmony which inspired her life long before oriental philosophy became the popular. her preoccupation with motion and light dominate her work, which appears in book after book. her photographs of children are deceptively simple. they appeared to be about what children do. and when you reflect on them you understand they are photographs of human experiences. only rarely of events.
what children do and what affects their actions have interested her throughout her life. at 73, children flocked to barbara morgan. perhaps because they sense she is able to help in the process of growing up. eye, a voice, wheels,five gears, four is yellow all over, and holds one and a half people? it is a pedal powered people mover which you may buy for $500.
you may pedal with one foot, or both feet. it's meant for short distance travel. all the energy it takes to make it go is your own. it's manufactured in connecticut. it is easy to maintain, does not pollute, and gives exercise. especially going uphill. when your job keeps you running from building to building, it will keep you out of the rain.