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Hong Kong Scientists in Ancient China souvenir sheet MNH 2015
Detailed Description China has witnessed the emergence of many highly respected scientists over the past few thousand years. Their remarkable attainments in various areas underpinned ancient China’s world-leading position in science. This set of stamps, e ... Read More
Item Specifics
- Country
- Hong Kong
- Condition
- Mint (NH)
- Stamp Format
- Souvenir Sheet
Item Description
Detailed DescriptionChina has witnessed the emergence of many highly respected scientists over the past few thousand years. Their remarkable attainments in various areas underpinned ancient China’s world-leading position in science. This set of stamps, entitled “Scientists in Ancient China”, depicts four of the greatest figures in the realms of astronomy, mathematics and medicine, namely, Zhang Heng, Zu Chongzhi, Guo Shoujing and Li Shizhen. Each highlighting one aspect of their contributions to science, the stamps showcase the extraordinary scientific achievements of our nation in ancient times.
$1.70 Zhang Heng (AD 78-139), an astronomer in the Eastern Han Dynasty, invented the world’s first seismoscope in the first year of the Yangjia Reign (AD 132). At the centre of the cavity of this bronze instrument was a hanging pendulum which carried eight mobile arms and cranks connected to eight corresponding dragons around the instrument’s surface. Each dragon held a bronze ball in its mouth and beneath the head of each dragon sat a toad with its mouth opening upwards. In the event of an earthquake, the vibrating pendulum would move the crank of a mobile arm in a specific direction and cause the corresponding dragon to release the small bronze ball into the open mouth of a toad. The time and direction of the earthquake could thus be deduced.
$2.90 Zu Chongzhi (AD 429-500) was a mathematician-cum-astronomer in the Southern and Northern Dynasties. His calculation of pi was undoubtedly his greatest achievement in mathematics. Using the “cyclotomic method”, he concluded that the value of pi fell between 3.1415926 and 3.1415927 after some complicated calculations. This approximation, accurate to the seventh decimal place, was a monumental accomplishment in the world at that time.
$3.70 Guo Shoujing (AD 1231-1316) was an astronomer, mathematician and hydraulics expert in the Yuan Dynasty who invented over ten instruments, including the Simplified Armilla, Lofty Gnomon and Pole-observing Instrument. By simplifying the traditional armillary sphere, he created the Simplified Armilla to measure the equatorial coordinates of celestial bodies. Without the traditional ecliptic circle, the Simplified Armilla featured two separated components for measuring equatorial and azimuthal coordinates, and an alidade substituting for the sighting-tube in the traditional armillary sphere. Crosshairs on the alidade allowed accurate pointing at celestial bodies and hence greater observational accuracy.
$5 Li Shizhen (AD 1518-1593) was a medical expert and pharmacologist in the Ming Dynasty. He spent about 30 years compiling books on medicine, culminating in the completion of the Compendium of Materia Medica in 1578. The Compendium grouped 1,892 medicinal substances into 16 divisions and 60 orders with a precise description for each substance. The book was regarded as the most comprehensive pharmacological taxonomy work at that time.
Acknowledgement: Hong Kong Science MuseumMULTIPLE VARIATIONs
If you see a or sign in the picture, this means there are multiple variations available for this item. The item consists of only one of the variations as shown in the picture, not all variations. I will send out any one based on availability. If you want to specify any particular variation, please check with me before you bid the item or place the order.Pre-order item
For any pre-order item, i will always ship it out together with everything on the same invoice once it is available. If you want other items arrive earlier, please let me know and i will split the invoice before you pay.
Large/Special Order
If you have any special order (large quantities, special stamps), please check with me directly. I have not posted everything due to the limited Hip store space.
Shipping & Handling Time
Most of the items (except Pre-order items and FDC) will be sent out WITHIN 1 BUSINESS DAY after you pay the invoice. Please review the positive feedback from the buyers. The actual delivery time varies due to the destination.
Shipping & Handling Fee
I am trying to offer the lowest shipping fee if possible. The item will be sent out via USPS standard mail (or first class mail) with no tracking number. I will take a picture of the package as proof of delivery. The shipping fee is listed as below -
* First item (USA) - BETWEEN USD $1.17 AND USD $2.29, DEPENDS ON THE SIZE
* First Item (International) - BETWEEN USD $1.83 AND USD $5.84, DEPENDS ON THE DESTINATION
* Each eligible additional item (USA / International) - USD $0.10 (see combined shipping discount), independent of size and destination
Combined Shipping Discount
The combined shipping discount can be applied only on the items showing up in the same invoice. Each eligible additional item will be charged an additional of USD $0.10 as the shipping fee. If you have any question, please check with me before you pay. I will always get back to you within 12 hours.
Important tips to save shipping fee -
> If you are purchasing multiple stamps through "Buy it now" option, please make sure all the items are in the basket before any payment. Please review the invoice carefully to ensure all the items are listed there so that Hip System can apply the combined shipping discount properly.
>
> otherwise, Hip / paypal will charge the full shipping fee for each item and they withhold the transaction fee & commission based on full shipping payment. There is no easy way to refund the difference unless we cancel all the transactions one by one.
>
> if you have any question, please check with me before any payment.
Package Loss Responsibilities
In order to provide the lowest shipping fee, I am sending all items by USPS standard mail without tracking number. I cannot hold responsible if the packet is lost due to postage. If you need extra shipping protection, please consider the following options and let me know before you pay -
* Shipping Tracking Number - an extra of USD $1.00 PER INVOICE
* Registered mail with signature - between USD $10.00 and USD $15.00, please check with me before you pay.
Us Stamps Plate Number
The actual plate number of the US Stamps may vary unless it is specified in the Item description / title. If you need the exact plate number shown in the picture, please check with me before you place the order.
Us Stamp Sheets Plate Position
The actual plate position of the US Stamp Sheets may vary unless it is specified in the Item description / title. If you need the exact plate position shown in the picture, please check with me before you place the order.
Sales History
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- Item Location
- California, United States
- Ships To
- United States, China
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- Returns Accepted
- Yes
- Returns Policy
- Money Back - Returns Accepted within 30 Days (Buyer pays Shipping Cost)
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