Agriculture on a large scale, Science

Assignment Help:

Agriculture on a large scale:

Crops had  to  be  planted and  harvested in  the  right season. Floods were a recurrent phenomenon  in the river valleys, for which it was essential to be prepared beforehand. The observation of sun and stars  to  fix the length of a year became so  precise  that  already  in 2700 B.C., the Egyptians were able  to  fix  it at 365.2422 days! Sumerians  and their successors  in Mesopotamia adjusted t'he solar (sun-based)  and lunar (moon-based) calendars through accurate observations.  They invented the sexagesimal system of 360 degrees in a circle (near enough to the days in  a year), 60 minutes in  an hour, 60 seconds in a minute.  The exercises were carried out using mathematical tables and ied to algebra and arithmetic of  the later epochs. Another occupation  that came to be very prestigious with  the growth of  cities was that of medicine.  Although the practice of medicine was limited to treating wounds, dislocations, fractures etc., the practitioners could successfully diagnose many diseases. They could compare cases with one another, notice different diseases and record them.  From such descriptions, orally passed on  to later generations, arose the sciences of  anatomy and physiology.  Practitioners  of medicine also had  the knowledge of plants and mineral substances to prepare drugs for various diseases. They grew plants and herbs for this purpose.  It is from this source  that the science of botany arose later. The basis for chemistry was laid in the observations  and practices of jewellers, metal- workers and potters.  They knew about at least nine chemical elements-gold,  silver, copper, tin, lead, mercury, iron, sulphur and carbon, and also about a variety of dry and liquid reagents.  The process of  smelting ores, of purifying metals, of colouring  them, of adding enamel%-all  involve complex chemical reactions  that were learnt by many trials and experiments. However, chemistry never rose to the rank of a recognised science  in  the 'Bronze Age.  


Related Discussions:- Agriculture on a large scale

Immune mechanisms - physiology of growth and development, Explain the Immun...

Explain the Immune mechanisms - Physiology of Growth and Development The immune system starts functioning in a baby through the inherited antibody (Ab) of the mother. But these

Explain dyes for measurement of plasma volume, Explain Dyes for Measurement...

Explain Dyes for Measurement of Plasma Volume: A number of dyes, commonly known as 'vital dyes', have the ability to combine with proteins. When such a dye is injected into the

What is the significance of soil colour, What is the significance of soil c...

What is the significance of soil colour Soil colour is significant in soil classification, i.e. the characterisation of soil,  interpreting soil properties and understanding so

Control of environment, Control of Environment: Control of environmen...

Control of Environment: Control of environment  is essential for maintaining good health. Environmental factors which are basic to individual and community health are housing

Explain the hormones in the urine, Explain the Hormones in the urine In...

Explain the Hormones in the urine Increased or decreased production of a hormone in the body alters the amount of hormone or its degraded products excreted in the urine. For ex

Social role of communication, Social Role of Communication: Social  r...

Social Role of Communication: Social  relevance of communication follows from the economic and political role of communication. We, in this country, have often talked about u

Explain different types of blinding with an example, Question 1 Which of t...

Question 1 Which of the following is best control group for double blind Phase II clinical trial? Justify your Answer. Placebo Concurrent Control No-treatment Concurrent

Explain cholesterol - constituents of bile, Explain Cholesterol - Constitue...

Explain Cholesterol - Constituents of Bile Cholesterol: Cholesterol is an extremely important compound, a constituent of most cell membranes and the precursor of bile acids and

Determine the quantity of leachate that generated each year, 1. If the land...

1. If the landfill had a compacted density of 600 Kg/m3 a refuse  depth of 9 m (29.5 ft), a moisture content of 20% by volume, and a 1-m  (3.25-ft)-thick clay cover with a 2% slope

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd