### TIMELINE

**THE FIRST MILLENIUM**

**THE CENTURY****THE MIDDLE AGES****SEVENTEENTH****EIGHTEENTH****NINETEENTH****TWENTIETH**

**THE FIRST MILLENIUM**

**THE CENTURY****THE MIDDLE AGES****SEVENTEENTH****EIGHTEENTH****NINETEENTH****TWENTIETH**

**PRE-SOCRATICS**

THALES

ANAXIMANDER

ANAXAGORAS

EMPEDOCLES

HIPPOCRATES

DEMOCRITUS

ZENO

I am flattered if you have considered following this weblog.

In creating this ‘ WordPress©‘ project, my primary intention is to learn more about HTML coding, I have used the content as simple boilerplate text.

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This is not a research diary nor a blog about contemporary advances in scientific thought.

I learn more each day about the topics covered in the content, and shall continue correcting errors that I find; I presently act as editor and proofreader.

The most recent occasion of finding a typo was also the occasion of discovering a grievous error that had remained undetected possibly since the site was opened. Because this typo (on the ‘Scientific method’ page) inverted the meaning of a paragraph, and by implication the tenor of much of the site, I apologise here with humility. Sorry.

Although I have tried always to be accurate, errors and ambiguities have arisen in the text and I continue to seek for ways of improving the site and the clarity and accuracy of the information. I urge all readers to conduct further research into any topic of interest.

Although the progress of scientific research and discovery continues, the text and content of this web-log is concerned with the origins in history of the ideas examined. My attempts at improvement shall be to make this more clear, not to add further information.

Although the blog is not static nor will it ever be complete – I shall not be adding additional pages of information.

Following, therefore, shall inform you only of page alterations, and not of new content.

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Thank You again for your expressions of interest – Best Wishes in your endeavours and in your research. The World Wide Web is one of the tools my teachers dreamed of when I was introduced to research many years ago – use it wisely and often.

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In the spirit of ‘ WordPress© ‘ I shall continue to share and link, although you shall find few new postings to this site until I change the scheme to make the present content easier to navigate and to read.

geoff neilsen 2014

1827 – Germany

‘The electric current in a conductor is proportional to the potential difference’

In equation form, **V = IR**, where **V** is the potential difference, **I** is the current and **R** is a constant called resistance.

Ohm’s law links voltage (potential difference) with current and resistance and the scientists VOLTA, AMPERE and OHM.

Ohm is now honoured by having the unit of electrical resistance named after him.

If we use units of **V**, **I** and **R**, Ohm’s law can be written in units as:

**volts = ampere × ohm**

1755 – Switzerland

‘Analytical calculus – the study of infinite processes and their limits’

Swiss mathematician. His notation is even more far-reaching than that of LEIBNIZ and much of the mathematical notation that is in use to-day may be credited to Euler.

The number of theorems, equations and formulae named after him is enormous.

Euler made important discoveries in the analytic geometry of surfaces and the theory of differential equations.

Euler popularised the use of the symbol ‘**Π**‘ (Pi); ** e** , for the base of the natural logarithm; and

Euler is credited with contributing the useful notations

- Leonhard Euler (usna.edu/)
- Quote (boyslumber.wordpress.com)
- Ahmad Syaiful Rizal WordPress site (ahmadsyaifulrizalmath.wordpress.com/2013/02/17/144/)